Superior Mesenteric Artery Syndrome as a Complication of Scoliosis Surgery

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Superior Mesenteric Artery Syndrome as a Complication of Scoliosis Surgery

Take-Home Points

  • Adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome following pediatric spine surgery.
  • Must recognize nonspecific symptoms such as abdominal pain, tenderness, distention, bilious or projectile vomiting, hypoactive bowel sounds, and anorexia postoperatively.
  • Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, or cardiovascular collapse and death.

Superior mesenteric artery (SMA) syndrome resulting from surgical treatment of scoliosis has been recognized in the medical literature since 1752.1 Throughout the literature, SMA syndrome variably has been referred to as cast syndrome, Wilkie syndrome, arteriomesenteric duodenal obstruction, and chronic duodenal ileus.2 We now recognize numerous etiologies of SMA syndrome, as several sources can externally compress the duodenum. Classic acute symptoms of bowel obstruction include bilious vomiting, nausea, and epigastric pain. Chronic manifestations of SMA syndrome may include weight loss and decreased appetite. Our literature review revealed that adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome after pediatric spine surgery.

We report the case of a 14-year-old boy who developed SMA syndrome after undergoing scoliosis surgery. The patient and his mother provided written informed consent for print and electronic publication of this case report.

Case Report

A 14-year-old boy with a history of idiopathic scoliosis presented to Cohen Children’s Hospital (Long Island Jewish Medical Center) with bilious vomiting that had persisted for 7 days after posterior T9–L4 fusion with instrumentation.

Preoperative radiographs revealed a 55° right Lenke V C curve (Figures 1, 2). Before the procedure, the patient weighed 111.6 lb and was 175 cm tall. The surgery was uneventful, with a curve correction to about 7° (Figures 3A, 3B). No abnormalities were noted during intraoperative neurologic monitoring. After an unremarkable postoperative course, on postoperative day 19 the patient presented to the emergency department (ED) with abdominal pain, nausea, and vomiting of 3 days’ duration. Right lower quadrant ultrasound revealed nonspecific fluid-filled bowel loops, and the patient was discharged with antiemetics and instructions for hydration. Two days later, he returned to the ED with unrelenting brown vomitus and abdominal pain and noted a 20-lb weight loss over 2 weeks. He was admitted to the postanesthesia care unit for dehydration and for QT prolongation secondary to electrolyte abnormalities. On admission, he weighed 88.2 lb. An upper gastrointestinal (GI) contrast radiograph confirmed a diagnosis of SMA syndrome, and a nasojejunal tube was placed. The patient gained no weight over 10 days; a gastrojejunal tube was placed until he was able to tolerate oral nutritional intake, 5 weeks later. He was followed by the nutrition and general surgery teams to ensure clinical improvement. Surgical intervention was unnecessary. One year after surgery, the patient was home and doing well without permanent sequelae.

Discussion

SMA syndrome is attributed to the anatomical orientation of the third part of the duodenum, which passes between the aorta and the SMA (Figure 4).

The SMA, an anterior branch of the aorta at the L1 vertebral level, is encased in fat and lymphatic tissue. Its acute caudal descent is sometimes referred to as a nutcracker configuration.2 Normal SMA angles are highly variable. One study described 75 aortas with angles ranging from 20° to 70°.3 SMA angle reduction results in extrinsic compression of the duodenum by the SMA. A common influence is the loss of protective peripancreatic and periduodenal fat below the SMA origin secondary to significant weight loss of any kind, such as from anorexia nervosa, malabsorption, and malignancy. Correcting a scoliotic curve through spinal manipulation essentially results in a lengthening of the vertebral column, which displaces the SMA origin more superiorly and creates a more acute aortomesenteric artery angle.

Adolescents are particularly vulnerable to this condition. Faster adolescent bone growth relative to visceral growth is accompanied by a decrease in SMA angle.3 Occasionally, body casts are used after surgery to immobilize the vertebrae and augment healing. Cast syndrome occurs when pressure from a body cast causes a bowel obstruction secondary to spinal hyperextension and amplified spinal lordosis.2 This finding, dating to the 19th century, was reported by Willet4 when a patient died 48 hours after application of a body cast. In 1950, the term cast syndrome was coined after a motorcyclist’s injuries were treated with a hip spica cast and the patient died of cardiovascular collapse secondary to persistent vomiting.5

Table 1 summarizes various evaluation, diagnosis, and treatment algorithms designed to optimize nutrition and weight in patients developing signs and symptoms of SMA syndrome after posterior spinal instrumentation and fusion for adolescent idiopathic scoliosis (AIS).

Of note, about 50% of patients with SMA syndrome present in the first week after spine surgery, 35% in the second week, and 15% more than 2 weeks after surgery. A patient presenting with abdominal pain/distension, nausea, and vomiting after scoliosis surgery should be initially evaluated for signs of intestinal obstruction.6 An abdominal radiograph can be used to assess for distended bowel gas or air-fluid levels, though this imaging study has also been found to be within normal range in an eventual SMA syndrome diagnosis. SMA syndrome can often be differentiated from postoperative ileus by fever/tachycardia and peritoneal signs. In the presence of positive findings for intestinal obstruction, initial management should begin with nasogastric decompression, electrolyte correction, and intravenous hydration. Otherwise, management should be to observe, treat with antiemetics, and reassess periodically.6 The first step is to start auxiliary enteral nutritional support through a nasojejunal feeding tube—or total parenteral nutrition if enteral feeding is unacceptable. Often, SMA syndrome is definitively diagnosed with an upper GI barium study with simultaneous angiography. If the diagnosis of SMA syndrome is made and symptoms improve, conservative management should be continued and diet slowly advanced. If symptoms worsen or significant weight loss occurs, surgical management should be considered. Surgical management is performed through laparoscopic or open duodenojejunostomy, division of the ligament of Treitz, or a modified Ladd procedure.7-10 Removal of spinal implants and cast is unnecessary, except when lumbar spine hyperextension is the cause, in which case cast and metal implants must be removed to relieve the duodenum from the SMA.7The incidence of SMA syndrome after scoliosis surgery is 1% to 4.7%.3,6,7 Our literature review of SMA syndrome after scoliosis surgery for AIS revealed 19 case reports over 45 years (Table 2). Studies reported that the incidence of SMA syndrome was higher in certain groups based on the extent of spinal deformity and the Lenke classification system for scoliosis.11,12 Specifically, groups with body mass index under the 25th percentile, Lenke B or C (laterally displaced, curved) scoliosis, and stiffer thoracic curves (<60% correction) have a higher incidence.12 Overall, initial presentation of SMA syndrome generally consists of a combination of abdominal pain/distension, nausea, vomiting, and varying degrees of weight loss. Although the predominant cases are confirmed with upper GI contrast studies, some cases are confirmed with radiographs, laboratory (serum lipase) abnormalities, and correlated with their clinical presentation in order to direct their therapy.13-15 For patients diagnosed with SMA syndrome, length of stay varies significantly, from 3 to 71 days. Time in hospital generally depends on ability to transition a patient to oral intake without complication. Eighty-five percent of reported cases of SMA syndrome after spinal surgery for AIS present within the first 2 weeks after surgery.1,6,7,9,13-19Our patient’s case had a combination of unique features. First, he presented 19 days (almost 3 weeks) after surgery. We identified only 3 other case reports in which the patient presented later (most SMA syndrome symptoms present within 2 weeks of the spinal procedure). One patient presented on postoperative day 27 and was discharged with a nasojejunal tube because of an inability to tolerate oral intake.6 Another patient presented 40 days after surgery, underwent laparotomy (a fundal perforation was found), and died immediately afterward.15 A third presented 45 days after surgery and had a treatment experience similar to our patient’s: nasogastric decompression, intravenous fluids, nasojejunal tube feeding, and transition to oral intake before discharge.7Our case’s second unique feature is the 20-lb weight loss over 2 weeks—more than in most other cases over the same period. For patients with recorded weight loss, average weight loss was about 6.2 pounds per postoperative presentation week, and only 1 patient presented with a steeper trajectory of weight loss before presentation.18 Our patient may have waited longer to present to the ED or may have had a more severe case of the disease.

The third unique feature in this case is electrocardiogram findings. Although some cases briefly discussed electrolyte abnormalities, none presented evidence that these abnormalities caused cardiac changes.6,16,18 The overall clinical significance of the QT prolongation in our patient’s case is unknown, as this finding was improved with correction of the electrolyte abnormalities and appropriate fluid replenishment.

Early recognition of nonspecific symptoms (eg, abdominal pain, tenderness, distension, bilious or projectile vomiting, hypoactive bowel sounds, anorexia) plays a key role in preventing severe morbidity and mortality from SMA syndrome after scoliosis surgery. Although many patients present in the semiclassic obstructed pattern, notable reasons for diagnostic delay include normal appetite and bowel sounds.3 For example, SMA syndrome may be misdiagnosed as stomach flu because of unfamiliarity with disease diagnosis and management.20 Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, and cardiovascular collapse and death.

Am J Orthop. 2017;46(2):E124-E130. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

References

1. Evarts CM, Winter RB, Hall JE. Vascular compression of the duodenum associated with the treatment of scoliosis. Review of the literature and report of eighteen cases. J Bone Joint Surg Am. 1971;53(3):431-444.

2. Zhu ZZ, Qiu Y. Superior mesenteric artery syndrome following scoliosis surgery: its risk indicators and treatment strategy. World J Gastroenterol. 2005;11(21):3307-3310.

3. Hutchinson DT, Bassett GS. Superior mesenteric artery syndrome in pediatric orthopedic patients. Clin Orthop Relat Res. 1990;(250):250-257.

4. Willet A. Fatal vomiting following application of plaster-of-Paris bandage in case of spinal curvature. St Barth Hosp Rep. 1878;14:333-335.

5. Dorph MH. The cast syndrome; review of the literature and report of a case. N Engl J Med. 1950;243(12):440-442.

6. Lam DJ, Lee JZ, Chua JH, Lee YT, Lim KB. Superior mesenteric artery syndrome following surgery for adolescent idiopathic scoliosis: a case series, review of the literature, and an algorithm for management. J Pediatr Orthop B. 2014;23(4):312-318.

7. Tsirikos AI, Anakwe RE, Baker AD. Late presentation of superior mesenteric artery syndrome following scoliosis surgery: a case report. J Med Case Rep. 2008;2:9.

8. Akin JT Jr, Skandalakis JE, Gray SW. The anatomic basis of vascular compression of the duodenum. Surg Clin North Am. 1974;54(6):1361-1370.

9. Amy BW, Priebe CJ Jr, King A. Superior mesenteric artery syndrome associated with scoliosis treated by a modified Ladd procedure. J Pediatr Orthop. 1985;5(3):361-363.

10. Richardson WS, Surowiec WJ. Laparoscopic repair of superior mesenteric artery syndrome. Am J Surg. 2001;181(4):377-378.

11. Lenke LG, Betz RR, Harms J, et al. Adolescent idiopathic scoliosis: a new classification to determine extent of spinal arthrodesis. J Bone Joint Surg Am. 2001;83(8):1169-1181.

12. Braun SV, Hedden DM, Howard AW. Superior mesenteric artery syndrome following spinal deformity correction. J Bone Joint Surg Am. 2006;88(10):2252-2257.

13. Smith BG, Hakim-Zargar M, Thomson JD. Low body mass index: a risk factor for superior mesenteric artery syndrome in adolescents undergoing spinal fusion for scoliosis. J Spinal Disord Tech. 2009;22(2):144-148.

14. Pan CH, Tzeng ST, Chen CS, Chen PQ. Superior mesenteric artery syndrome complicating staged corrective surgery for scoliosis. J Formos Med Assoc. 2007;106(2 suppl):S37-S45.

15. Kennedy RH, Cooper MJ. An unusually severe case of the cast syndrome. Postgrad Med J. 1983;59(694):539-540.

16. Keskin M, Akgül T, Bayraktar A, Dikici F, Balik E. Superior mesenteric artery syndrome: an infrequent complication of scoliosis surgery. Case Rep Surg. 2014;2014:263431.

17. Amarawickrama H, Harikrishnan A, Krijgsman B. Superior mesenteric artery syndrome in a young girl following spinal surgery for scoliosis. Br J Hosp Med. 2005;66(12):700-701.

18. Crowther MA, Webb PJ, Eyre-Brook IA. Superior mesenteric artery syndrome following surgery for scoliosis. Spine. 2002;27(24):E528-E533.

19. Moskovich R, Cheong-Leen P. Vascular compression of the duodenum. J R Soc Med. 1986;79(8):465-467.

20. Shah MA, Albright MB, Vogt MT, Moreland MS. Superior mesenteric artery syndrome in scoliosis surgery: weight percentile for height as an indicator of risk. J Pediatr Orthop. 2003;23(5):665-668.

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Take-Home Points

  • Adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome following pediatric spine surgery.
  • Must recognize nonspecific symptoms such as abdominal pain, tenderness, distention, bilious or projectile vomiting, hypoactive bowel sounds, and anorexia postoperatively.
  • Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, or cardiovascular collapse and death.

Superior mesenteric artery (SMA) syndrome resulting from surgical treatment of scoliosis has been recognized in the medical literature since 1752.1 Throughout the literature, SMA syndrome variably has been referred to as cast syndrome, Wilkie syndrome, arteriomesenteric duodenal obstruction, and chronic duodenal ileus.2 We now recognize numerous etiologies of SMA syndrome, as several sources can externally compress the duodenum. Classic acute symptoms of bowel obstruction include bilious vomiting, nausea, and epigastric pain. Chronic manifestations of SMA syndrome may include weight loss and decreased appetite. Our literature review revealed that adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome after pediatric spine surgery.

We report the case of a 14-year-old boy who developed SMA syndrome after undergoing scoliosis surgery. The patient and his mother provided written informed consent for print and electronic publication of this case report.

Case Report

A 14-year-old boy with a history of idiopathic scoliosis presented to Cohen Children’s Hospital (Long Island Jewish Medical Center) with bilious vomiting that had persisted for 7 days after posterior T9–L4 fusion with instrumentation.

Preoperative radiographs revealed a 55° right Lenke V C curve (Figures 1, 2). Before the procedure, the patient weighed 111.6 lb and was 175 cm tall. The surgery was uneventful, with a curve correction to about 7° (Figures 3A, 3B). No abnormalities were noted during intraoperative neurologic monitoring. After an unremarkable postoperative course, on postoperative day 19 the patient presented to the emergency department (ED) with abdominal pain, nausea, and vomiting of 3 days’ duration. Right lower quadrant ultrasound revealed nonspecific fluid-filled bowel loops, and the patient was discharged with antiemetics and instructions for hydration. Two days later, he returned to the ED with unrelenting brown vomitus and abdominal pain and noted a 20-lb weight loss over 2 weeks. He was admitted to the postanesthesia care unit for dehydration and for QT prolongation secondary to electrolyte abnormalities. On admission, he weighed 88.2 lb. An upper gastrointestinal (GI) contrast radiograph confirmed a diagnosis of SMA syndrome, and a nasojejunal tube was placed. The patient gained no weight over 10 days; a gastrojejunal tube was placed until he was able to tolerate oral nutritional intake, 5 weeks later. He was followed by the nutrition and general surgery teams to ensure clinical improvement. Surgical intervention was unnecessary. One year after surgery, the patient was home and doing well without permanent sequelae.

Discussion

SMA syndrome is attributed to the anatomical orientation of the third part of the duodenum, which passes between the aorta and the SMA (Figure 4).

The SMA, an anterior branch of the aorta at the L1 vertebral level, is encased in fat and lymphatic tissue. Its acute caudal descent is sometimes referred to as a nutcracker configuration.2 Normal SMA angles are highly variable. One study described 75 aortas with angles ranging from 20° to 70°.3 SMA angle reduction results in extrinsic compression of the duodenum by the SMA. A common influence is the loss of protective peripancreatic and periduodenal fat below the SMA origin secondary to significant weight loss of any kind, such as from anorexia nervosa, malabsorption, and malignancy. Correcting a scoliotic curve through spinal manipulation essentially results in a lengthening of the vertebral column, which displaces the SMA origin more superiorly and creates a more acute aortomesenteric artery angle.

Adolescents are particularly vulnerable to this condition. Faster adolescent bone growth relative to visceral growth is accompanied by a decrease in SMA angle.3 Occasionally, body casts are used after surgery to immobilize the vertebrae and augment healing. Cast syndrome occurs when pressure from a body cast causes a bowel obstruction secondary to spinal hyperextension and amplified spinal lordosis.2 This finding, dating to the 19th century, was reported by Willet4 when a patient died 48 hours after application of a body cast. In 1950, the term cast syndrome was coined after a motorcyclist’s injuries were treated with a hip spica cast and the patient died of cardiovascular collapse secondary to persistent vomiting.5

Table 1 summarizes various evaluation, diagnosis, and treatment algorithms designed to optimize nutrition and weight in patients developing signs and symptoms of SMA syndrome after posterior spinal instrumentation and fusion for adolescent idiopathic scoliosis (AIS).

Of note, about 50% of patients with SMA syndrome present in the first week after spine surgery, 35% in the second week, and 15% more than 2 weeks after surgery. A patient presenting with abdominal pain/distension, nausea, and vomiting after scoliosis surgery should be initially evaluated for signs of intestinal obstruction.6 An abdominal radiograph can be used to assess for distended bowel gas or air-fluid levels, though this imaging study has also been found to be within normal range in an eventual SMA syndrome diagnosis. SMA syndrome can often be differentiated from postoperative ileus by fever/tachycardia and peritoneal signs. In the presence of positive findings for intestinal obstruction, initial management should begin with nasogastric decompression, electrolyte correction, and intravenous hydration. Otherwise, management should be to observe, treat with antiemetics, and reassess periodically.6 The first step is to start auxiliary enteral nutritional support through a nasojejunal feeding tube—or total parenteral nutrition if enteral feeding is unacceptable. Often, SMA syndrome is definitively diagnosed with an upper GI barium study with simultaneous angiography. If the diagnosis of SMA syndrome is made and symptoms improve, conservative management should be continued and diet slowly advanced. If symptoms worsen or significant weight loss occurs, surgical management should be considered. Surgical management is performed through laparoscopic or open duodenojejunostomy, division of the ligament of Treitz, or a modified Ladd procedure.7-10 Removal of spinal implants and cast is unnecessary, except when lumbar spine hyperextension is the cause, in which case cast and metal implants must be removed to relieve the duodenum from the SMA.7The incidence of SMA syndrome after scoliosis surgery is 1% to 4.7%.3,6,7 Our literature review of SMA syndrome after scoliosis surgery for AIS revealed 19 case reports over 45 years (Table 2). Studies reported that the incidence of SMA syndrome was higher in certain groups based on the extent of spinal deformity and the Lenke classification system for scoliosis.11,12 Specifically, groups with body mass index under the 25th percentile, Lenke B or C (laterally displaced, curved) scoliosis, and stiffer thoracic curves (<60% correction) have a higher incidence.12 Overall, initial presentation of SMA syndrome generally consists of a combination of abdominal pain/distension, nausea, vomiting, and varying degrees of weight loss. Although the predominant cases are confirmed with upper GI contrast studies, some cases are confirmed with radiographs, laboratory (serum lipase) abnormalities, and correlated with their clinical presentation in order to direct their therapy.13-15 For patients diagnosed with SMA syndrome, length of stay varies significantly, from 3 to 71 days. Time in hospital generally depends on ability to transition a patient to oral intake without complication. Eighty-five percent of reported cases of SMA syndrome after spinal surgery for AIS present within the first 2 weeks after surgery.1,6,7,9,13-19Our patient’s case had a combination of unique features. First, he presented 19 days (almost 3 weeks) after surgery. We identified only 3 other case reports in which the patient presented later (most SMA syndrome symptoms present within 2 weeks of the spinal procedure). One patient presented on postoperative day 27 and was discharged with a nasojejunal tube because of an inability to tolerate oral intake.6 Another patient presented 40 days after surgery, underwent laparotomy (a fundal perforation was found), and died immediately afterward.15 A third presented 45 days after surgery and had a treatment experience similar to our patient’s: nasogastric decompression, intravenous fluids, nasojejunal tube feeding, and transition to oral intake before discharge.7Our case’s second unique feature is the 20-lb weight loss over 2 weeks—more than in most other cases over the same period. For patients with recorded weight loss, average weight loss was about 6.2 pounds per postoperative presentation week, and only 1 patient presented with a steeper trajectory of weight loss before presentation.18 Our patient may have waited longer to present to the ED or may have had a more severe case of the disease.

The third unique feature in this case is electrocardiogram findings. Although some cases briefly discussed electrolyte abnormalities, none presented evidence that these abnormalities caused cardiac changes.6,16,18 The overall clinical significance of the QT prolongation in our patient’s case is unknown, as this finding was improved with correction of the electrolyte abnormalities and appropriate fluid replenishment.

Early recognition of nonspecific symptoms (eg, abdominal pain, tenderness, distension, bilious or projectile vomiting, hypoactive bowel sounds, anorexia) plays a key role in preventing severe morbidity and mortality from SMA syndrome after scoliosis surgery. Although many patients present in the semiclassic obstructed pattern, notable reasons for diagnostic delay include normal appetite and bowel sounds.3 For example, SMA syndrome may be misdiagnosed as stomach flu because of unfamiliarity with disease diagnosis and management.20 Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, and cardiovascular collapse and death.

Am J Orthop. 2017;46(2):E124-E130. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

Take-Home Points

  • Adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome following pediatric spine surgery.
  • Must recognize nonspecific symptoms such as abdominal pain, tenderness, distention, bilious or projectile vomiting, hypoactive bowel sounds, and anorexia postoperatively.
  • Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, or cardiovascular collapse and death.

Superior mesenteric artery (SMA) syndrome resulting from surgical treatment of scoliosis has been recognized in the medical literature since 1752.1 Throughout the literature, SMA syndrome variably has been referred to as cast syndrome, Wilkie syndrome, arteriomesenteric duodenal obstruction, and chronic duodenal ileus.2 We now recognize numerous etiologies of SMA syndrome, as several sources can externally compress the duodenum. Classic acute symptoms of bowel obstruction include bilious vomiting, nausea, and epigastric pain. Chronic manifestations of SMA syndrome may include weight loss and decreased appetite. Our literature review revealed that adolescent growth spurt, height-to-weight ratio, and perioperative weight loss are risk factors associated with SMA syndrome after pediatric spine surgery.

We report the case of a 14-year-old boy who developed SMA syndrome after undergoing scoliosis surgery. The patient and his mother provided written informed consent for print and electronic publication of this case report.

Case Report

A 14-year-old boy with a history of idiopathic scoliosis presented to Cohen Children’s Hospital (Long Island Jewish Medical Center) with bilious vomiting that had persisted for 7 days after posterior T9–L4 fusion with instrumentation.

Preoperative radiographs revealed a 55° right Lenke V C curve (Figures 1, 2). Before the procedure, the patient weighed 111.6 lb and was 175 cm tall. The surgery was uneventful, with a curve correction to about 7° (Figures 3A, 3B). No abnormalities were noted during intraoperative neurologic monitoring. After an unremarkable postoperative course, on postoperative day 19 the patient presented to the emergency department (ED) with abdominal pain, nausea, and vomiting of 3 days’ duration. Right lower quadrant ultrasound revealed nonspecific fluid-filled bowel loops, and the patient was discharged with antiemetics and instructions for hydration. Two days later, he returned to the ED with unrelenting brown vomitus and abdominal pain and noted a 20-lb weight loss over 2 weeks. He was admitted to the postanesthesia care unit for dehydration and for QT prolongation secondary to electrolyte abnormalities. On admission, he weighed 88.2 lb. An upper gastrointestinal (GI) contrast radiograph confirmed a diagnosis of SMA syndrome, and a nasojejunal tube was placed. The patient gained no weight over 10 days; a gastrojejunal tube was placed until he was able to tolerate oral nutritional intake, 5 weeks later. He was followed by the nutrition and general surgery teams to ensure clinical improvement. Surgical intervention was unnecessary. One year after surgery, the patient was home and doing well without permanent sequelae.

Discussion

SMA syndrome is attributed to the anatomical orientation of the third part of the duodenum, which passes between the aorta and the SMA (Figure 4).

The SMA, an anterior branch of the aorta at the L1 vertebral level, is encased in fat and lymphatic tissue. Its acute caudal descent is sometimes referred to as a nutcracker configuration.2 Normal SMA angles are highly variable. One study described 75 aortas with angles ranging from 20° to 70°.3 SMA angle reduction results in extrinsic compression of the duodenum by the SMA. A common influence is the loss of protective peripancreatic and periduodenal fat below the SMA origin secondary to significant weight loss of any kind, such as from anorexia nervosa, malabsorption, and malignancy. Correcting a scoliotic curve through spinal manipulation essentially results in a lengthening of the vertebral column, which displaces the SMA origin more superiorly and creates a more acute aortomesenteric artery angle.

Adolescents are particularly vulnerable to this condition. Faster adolescent bone growth relative to visceral growth is accompanied by a decrease in SMA angle.3 Occasionally, body casts are used after surgery to immobilize the vertebrae and augment healing. Cast syndrome occurs when pressure from a body cast causes a bowel obstruction secondary to spinal hyperextension and amplified spinal lordosis.2 This finding, dating to the 19th century, was reported by Willet4 when a patient died 48 hours after application of a body cast. In 1950, the term cast syndrome was coined after a motorcyclist’s injuries were treated with a hip spica cast and the patient died of cardiovascular collapse secondary to persistent vomiting.5

Table 1 summarizes various evaluation, diagnosis, and treatment algorithms designed to optimize nutrition and weight in patients developing signs and symptoms of SMA syndrome after posterior spinal instrumentation and fusion for adolescent idiopathic scoliosis (AIS).

Of note, about 50% of patients with SMA syndrome present in the first week after spine surgery, 35% in the second week, and 15% more than 2 weeks after surgery. A patient presenting with abdominal pain/distension, nausea, and vomiting after scoliosis surgery should be initially evaluated for signs of intestinal obstruction.6 An abdominal radiograph can be used to assess for distended bowel gas or air-fluid levels, though this imaging study has also been found to be within normal range in an eventual SMA syndrome diagnosis. SMA syndrome can often be differentiated from postoperative ileus by fever/tachycardia and peritoneal signs. In the presence of positive findings for intestinal obstruction, initial management should begin with nasogastric decompression, electrolyte correction, and intravenous hydration. Otherwise, management should be to observe, treat with antiemetics, and reassess periodically.6 The first step is to start auxiliary enteral nutritional support through a nasojejunal feeding tube—or total parenteral nutrition if enteral feeding is unacceptable. Often, SMA syndrome is definitively diagnosed with an upper GI barium study with simultaneous angiography. If the diagnosis of SMA syndrome is made and symptoms improve, conservative management should be continued and diet slowly advanced. If symptoms worsen or significant weight loss occurs, surgical management should be considered. Surgical management is performed through laparoscopic or open duodenojejunostomy, division of the ligament of Treitz, or a modified Ladd procedure.7-10 Removal of spinal implants and cast is unnecessary, except when lumbar spine hyperextension is the cause, in which case cast and metal implants must be removed to relieve the duodenum from the SMA.7The incidence of SMA syndrome after scoliosis surgery is 1% to 4.7%.3,6,7 Our literature review of SMA syndrome after scoliosis surgery for AIS revealed 19 case reports over 45 years (Table 2). Studies reported that the incidence of SMA syndrome was higher in certain groups based on the extent of spinal deformity and the Lenke classification system for scoliosis.11,12 Specifically, groups with body mass index under the 25th percentile, Lenke B or C (laterally displaced, curved) scoliosis, and stiffer thoracic curves (<60% correction) have a higher incidence.12 Overall, initial presentation of SMA syndrome generally consists of a combination of abdominal pain/distension, nausea, vomiting, and varying degrees of weight loss. Although the predominant cases are confirmed with upper GI contrast studies, some cases are confirmed with radiographs, laboratory (serum lipase) abnormalities, and correlated with their clinical presentation in order to direct their therapy.13-15 For patients diagnosed with SMA syndrome, length of stay varies significantly, from 3 to 71 days. Time in hospital generally depends on ability to transition a patient to oral intake without complication. Eighty-five percent of reported cases of SMA syndrome after spinal surgery for AIS present within the first 2 weeks after surgery.1,6,7,9,13-19Our patient’s case had a combination of unique features. First, he presented 19 days (almost 3 weeks) after surgery. We identified only 3 other case reports in which the patient presented later (most SMA syndrome symptoms present within 2 weeks of the spinal procedure). One patient presented on postoperative day 27 and was discharged with a nasojejunal tube because of an inability to tolerate oral intake.6 Another patient presented 40 days after surgery, underwent laparotomy (a fundal perforation was found), and died immediately afterward.15 A third presented 45 days after surgery and had a treatment experience similar to our patient’s: nasogastric decompression, intravenous fluids, nasojejunal tube feeding, and transition to oral intake before discharge.7Our case’s second unique feature is the 20-lb weight loss over 2 weeks—more than in most other cases over the same period. For patients with recorded weight loss, average weight loss was about 6.2 pounds per postoperative presentation week, and only 1 patient presented with a steeper trajectory of weight loss before presentation.18 Our patient may have waited longer to present to the ED or may have had a more severe case of the disease.

The third unique feature in this case is electrocardiogram findings. Although some cases briefly discussed electrolyte abnormalities, none presented evidence that these abnormalities caused cardiac changes.6,16,18 The overall clinical significance of the QT prolongation in our patient’s case is unknown, as this finding was improved with correction of the electrolyte abnormalities and appropriate fluid replenishment.

Early recognition of nonspecific symptoms (eg, abdominal pain, tenderness, distension, bilious or projectile vomiting, hypoactive bowel sounds, anorexia) plays a key role in preventing severe morbidity and mortality from SMA syndrome after scoliosis surgery. Although many patients present in the semiclassic obstructed pattern, notable reasons for diagnostic delay include normal appetite and bowel sounds.3 For example, SMA syndrome may be misdiagnosed as stomach flu because of unfamiliarity with disease diagnosis and management.20 Complications of SMA syndrome can potentially lead to aspiration pneumonia, acute gastric rupture, and cardiovascular collapse and death.

Am J Orthop. 2017;46(2):E124-E130. Copyright Frontline Medical Communications Inc. 2017. All rights reserved.

References

1. Evarts CM, Winter RB, Hall JE. Vascular compression of the duodenum associated with the treatment of scoliosis. Review of the literature and report of eighteen cases. J Bone Joint Surg Am. 1971;53(3):431-444.

2. Zhu ZZ, Qiu Y. Superior mesenteric artery syndrome following scoliosis surgery: its risk indicators and treatment strategy. World J Gastroenterol. 2005;11(21):3307-3310.

3. Hutchinson DT, Bassett GS. Superior mesenteric artery syndrome in pediatric orthopedic patients. Clin Orthop Relat Res. 1990;(250):250-257.

4. Willet A. Fatal vomiting following application of plaster-of-Paris bandage in case of spinal curvature. St Barth Hosp Rep. 1878;14:333-335.

5. Dorph MH. The cast syndrome; review of the literature and report of a case. N Engl J Med. 1950;243(12):440-442.

6. Lam DJ, Lee JZ, Chua JH, Lee YT, Lim KB. Superior mesenteric artery syndrome following surgery for adolescent idiopathic scoliosis: a case series, review of the literature, and an algorithm for management. J Pediatr Orthop B. 2014;23(4):312-318.

7. Tsirikos AI, Anakwe RE, Baker AD. Late presentation of superior mesenteric artery syndrome following scoliosis surgery: a case report. J Med Case Rep. 2008;2:9.

8. Akin JT Jr, Skandalakis JE, Gray SW. The anatomic basis of vascular compression of the duodenum. Surg Clin North Am. 1974;54(6):1361-1370.

9. Amy BW, Priebe CJ Jr, King A. Superior mesenteric artery syndrome associated with scoliosis treated by a modified Ladd procedure. J Pediatr Orthop. 1985;5(3):361-363.

10. Richardson WS, Surowiec WJ. Laparoscopic repair of superior mesenteric artery syndrome. Am J Surg. 2001;181(4):377-378.

11. Lenke LG, Betz RR, Harms J, et al. Adolescent idiopathic scoliosis: a new classification to determine extent of spinal arthrodesis. J Bone Joint Surg Am. 2001;83(8):1169-1181.

12. Braun SV, Hedden DM, Howard AW. Superior mesenteric artery syndrome following spinal deformity correction. J Bone Joint Surg Am. 2006;88(10):2252-2257.

13. Smith BG, Hakim-Zargar M, Thomson JD. Low body mass index: a risk factor for superior mesenteric artery syndrome in adolescents undergoing spinal fusion for scoliosis. J Spinal Disord Tech. 2009;22(2):144-148.

14. Pan CH, Tzeng ST, Chen CS, Chen PQ. Superior mesenteric artery syndrome complicating staged corrective surgery for scoliosis. J Formos Med Assoc. 2007;106(2 suppl):S37-S45.

15. Kennedy RH, Cooper MJ. An unusually severe case of the cast syndrome. Postgrad Med J. 1983;59(694):539-540.

16. Keskin M, Akgül T, Bayraktar A, Dikici F, Balik E. Superior mesenteric artery syndrome: an infrequent complication of scoliosis surgery. Case Rep Surg. 2014;2014:263431.

17. Amarawickrama H, Harikrishnan A, Krijgsman B. Superior mesenteric artery syndrome in a young girl following spinal surgery for scoliosis. Br J Hosp Med. 2005;66(12):700-701.

18. Crowther MA, Webb PJ, Eyre-Brook IA. Superior mesenteric artery syndrome following surgery for scoliosis. Spine. 2002;27(24):E528-E533.

19. Moskovich R, Cheong-Leen P. Vascular compression of the duodenum. J R Soc Med. 1986;79(8):465-467.

20. Shah MA, Albright MB, Vogt MT, Moreland MS. Superior mesenteric artery syndrome in scoliosis surgery: weight percentile for height as an indicator of risk. J Pediatr Orthop. 2003;23(5):665-668.

References

1. Evarts CM, Winter RB, Hall JE. Vascular compression of the duodenum associated with the treatment of scoliosis. Review of the literature and report of eighteen cases. J Bone Joint Surg Am. 1971;53(3):431-444.

2. Zhu ZZ, Qiu Y. Superior mesenteric artery syndrome following scoliosis surgery: its risk indicators and treatment strategy. World J Gastroenterol. 2005;11(21):3307-3310.

3. Hutchinson DT, Bassett GS. Superior mesenteric artery syndrome in pediatric orthopedic patients. Clin Orthop Relat Res. 1990;(250):250-257.

4. Willet A. Fatal vomiting following application of plaster-of-Paris bandage in case of spinal curvature. St Barth Hosp Rep. 1878;14:333-335.

5. Dorph MH. The cast syndrome; review of the literature and report of a case. N Engl J Med. 1950;243(12):440-442.

6. Lam DJ, Lee JZ, Chua JH, Lee YT, Lim KB. Superior mesenteric artery syndrome following surgery for adolescent idiopathic scoliosis: a case series, review of the literature, and an algorithm for management. J Pediatr Orthop B. 2014;23(4):312-318.

7. Tsirikos AI, Anakwe RE, Baker AD. Late presentation of superior mesenteric artery syndrome following scoliosis surgery: a case report. J Med Case Rep. 2008;2:9.

8. Akin JT Jr, Skandalakis JE, Gray SW. The anatomic basis of vascular compression of the duodenum. Surg Clin North Am. 1974;54(6):1361-1370.

9. Amy BW, Priebe CJ Jr, King A. Superior mesenteric artery syndrome associated with scoliosis treated by a modified Ladd procedure. J Pediatr Orthop. 1985;5(3):361-363.

10. Richardson WS, Surowiec WJ. Laparoscopic repair of superior mesenteric artery syndrome. Am J Surg. 2001;181(4):377-378.

11. Lenke LG, Betz RR, Harms J, et al. Adolescent idiopathic scoliosis: a new classification to determine extent of spinal arthrodesis. J Bone Joint Surg Am. 2001;83(8):1169-1181.

12. Braun SV, Hedden DM, Howard AW. Superior mesenteric artery syndrome following spinal deformity correction. J Bone Joint Surg Am. 2006;88(10):2252-2257.

13. Smith BG, Hakim-Zargar M, Thomson JD. Low body mass index: a risk factor for superior mesenteric artery syndrome in adolescents undergoing spinal fusion for scoliosis. J Spinal Disord Tech. 2009;22(2):144-148.

14. Pan CH, Tzeng ST, Chen CS, Chen PQ. Superior mesenteric artery syndrome complicating staged corrective surgery for scoliosis. J Formos Med Assoc. 2007;106(2 suppl):S37-S45.

15. Kennedy RH, Cooper MJ. An unusually severe case of the cast syndrome. Postgrad Med J. 1983;59(694):539-540.

16. Keskin M, Akgül T, Bayraktar A, Dikici F, Balik E. Superior mesenteric artery syndrome: an infrequent complication of scoliosis surgery. Case Rep Surg. 2014;2014:263431.

17. Amarawickrama H, Harikrishnan A, Krijgsman B. Superior mesenteric artery syndrome in a young girl following spinal surgery for scoliosis. Br J Hosp Med. 2005;66(12):700-701.

18. Crowther MA, Webb PJ, Eyre-Brook IA. Superior mesenteric artery syndrome following surgery for scoliosis. Spine. 2002;27(24):E528-E533.

19. Moskovich R, Cheong-Leen P. Vascular compression of the duodenum. J R Soc Med. 1986;79(8):465-467.

20. Shah MA, Albright MB, Vogt MT, Moreland MS. Superior mesenteric artery syndrome in scoliosis surgery: weight percentile for height as an indicator of risk. J Pediatr Orthop. 2003;23(5):665-668.

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Anthony Fauci faces the ‘perpetual challenge’ of emerging infections

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SAN DIEGO– Reflecting on his 33-year career as director of the National Institute of Allergy and Infectious Diseases, Anthony S. Fauci, MD, can say one thing for certain: Emerging and re-emerging infectious diseases in the continental United States are here to stay.

In an article that he and his colleagues published in the Lancet in 2008, they used the term “perpetual challenge” to describe emerging infections, a descriptor that resonates with him to this day.

Dr. Anthony S. Fauci
“When you think about emerging and re-emerging infectious diseases, they have always been with us, they are clearly with us now, and we will certainly be seeing them in the future in an absolute predictable way,” Dr. Fauci told a capacity crowd during a keynote lecture on the opening day of the annual meeting of the American College of Physicians.

Global examples of emerging and re-emerging infectious diseases he discussed include dengue, West Nile virus, chikungunya, and carbapenem-resistant Enterobacteriaceae, “which is becoming a progressively more serious problem in hospitalized patients,” said Dr. Fauci, who is also chief of the NIAID Laboratory of Immunoregulation.

“We had a serious challenge with that at our own clinical center in Bethesda just a few years ago,” he noted. Numerous cases of antimicrobial resistance in methicillin-resistant Staphylococcus aureus, Clostridium difficile, and Neisseria gonorrhoeae have been reported.

Dr. Fauci described the Ebola outbreak as “a globally important disease that had ripple effects in the United States that were unpredicted,” referring to the case of the infected man who traveled from Monrovia to Dallas on Sept. 19, 2014, and developed Ebola symptoms 5 days later. Between 2014 and 2016, there were 28,616 cases and 11,310 deaths combined in the countries of Guinea, Sierra Leone, and Liberia.

“There is virtually no health care system in those three countries,” he said. “There’s a distrust in authority, and anything we tried to do as a global health [effort] made things worse. What we’re trying to do now is built sustainable health care issues in countries that don’t have it.”

Of particular concern to public health officials worldwide is getting a lid on Zika virus, a mosquito-borne illness that can be passed from a pregnant woman to her fetus and cause an increased risk of microcephaly, particularly during the first trimester.

“Not only is there microcephaly, there’s a whole host of abnormalities that involve hearing loss, visual abnormalities, and a variety of other issues,” Dr. Fauci said. “There are about 50 countries in the Americas and the Caribbean that have Zika virus transmission.”

According to data from the Centers for Disease Control and Prevention, from Jan. 1, 2015, to March 29, 2017, there were 5,182 reported cases of Zika virus disease in the 50 states and the District of Columbia. The majority of those (4,886) were travel associated, 222 were locally acquired mosquito-borne, 45 were sexually transmitted, 27 congenital, 1 was laboratory acquired, and 1 was unknown.

At the same time, there have been 38,303 cases in the U.S. territories. Of those, 38,156 were locally acquired, and 147 were travel associated. “That’s why there’s such an intense effort to develop a Zika vaccine,” he said.

According to the CDC, as of March 15, 2017, there are 265 cases of locally transmitted cases in Florida: 216 by mosquito and the rest by sexual transmission. “Talk about surprises,” Dr. Fauci said. “Zika is the first mosquito-borne infection that can result in a congenital abnormality, the first mosquito-borne infection that can be sexually transmitted, and now we’re learning more about this problem, which is the reason why it’s very important for us to develop a vaccine.”

A phase I trial of a DNA vaccine developed by the NIH Vaccine Research Center has reached its enrollment goal of 80 patients age 18-35 years. Initial results are expected sometime in the first quarter of 2017. A phase II trial in the United States and Puerto Rico is expected to launch soon.

Dr. Fauci closed his presentation by sharing lessons learned from previous pandemics.

The first lesson is that global surveillance is required. “Namely, know what’s going on in real time,” he said. “That has to be linked to transparency and communication. So that if something happens in China, we don’t find out about it months later, but we know about it in real time.”

Infrastructure and capacity building are also important. “The lack of capacity in West Africa can ultimately have an indirect impact on us here in the United States,” he said.

“Finally, we need to coordinate and collaborate; we need adaptable platforms for vaccines,” Dr. Fauci cautioned. “Importantly, we need a stable funding mechanism such as a public health emergency fund so that we do not have to go scrambling before the Congress when we need emergency funds.”
 
 

 

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SAN DIEGO– Reflecting on his 33-year career as director of the National Institute of Allergy and Infectious Diseases, Anthony S. Fauci, MD, can say one thing for certain: Emerging and re-emerging infectious diseases in the continental United States are here to stay.

In an article that he and his colleagues published in the Lancet in 2008, they used the term “perpetual challenge” to describe emerging infections, a descriptor that resonates with him to this day.

Dr. Anthony S. Fauci
“When you think about emerging and re-emerging infectious diseases, they have always been with us, they are clearly with us now, and we will certainly be seeing them in the future in an absolute predictable way,” Dr. Fauci told a capacity crowd during a keynote lecture on the opening day of the annual meeting of the American College of Physicians.

Global examples of emerging and re-emerging infectious diseases he discussed include dengue, West Nile virus, chikungunya, and carbapenem-resistant Enterobacteriaceae, “which is becoming a progressively more serious problem in hospitalized patients,” said Dr. Fauci, who is also chief of the NIAID Laboratory of Immunoregulation.

“We had a serious challenge with that at our own clinical center in Bethesda just a few years ago,” he noted. Numerous cases of antimicrobial resistance in methicillin-resistant Staphylococcus aureus, Clostridium difficile, and Neisseria gonorrhoeae have been reported.

Dr. Fauci described the Ebola outbreak as “a globally important disease that had ripple effects in the United States that were unpredicted,” referring to the case of the infected man who traveled from Monrovia to Dallas on Sept. 19, 2014, and developed Ebola symptoms 5 days later. Between 2014 and 2016, there were 28,616 cases and 11,310 deaths combined in the countries of Guinea, Sierra Leone, and Liberia.

“There is virtually no health care system in those three countries,” he said. “There’s a distrust in authority, and anything we tried to do as a global health [effort] made things worse. What we’re trying to do now is built sustainable health care issues in countries that don’t have it.”

Of particular concern to public health officials worldwide is getting a lid on Zika virus, a mosquito-borne illness that can be passed from a pregnant woman to her fetus and cause an increased risk of microcephaly, particularly during the first trimester.

“Not only is there microcephaly, there’s a whole host of abnormalities that involve hearing loss, visual abnormalities, and a variety of other issues,” Dr. Fauci said. “There are about 50 countries in the Americas and the Caribbean that have Zika virus transmission.”

According to data from the Centers for Disease Control and Prevention, from Jan. 1, 2015, to March 29, 2017, there were 5,182 reported cases of Zika virus disease in the 50 states and the District of Columbia. The majority of those (4,886) were travel associated, 222 were locally acquired mosquito-borne, 45 were sexually transmitted, 27 congenital, 1 was laboratory acquired, and 1 was unknown.

At the same time, there have been 38,303 cases in the U.S. territories. Of those, 38,156 were locally acquired, and 147 were travel associated. “That’s why there’s such an intense effort to develop a Zika vaccine,” he said.

According to the CDC, as of March 15, 2017, there are 265 cases of locally transmitted cases in Florida: 216 by mosquito and the rest by sexual transmission. “Talk about surprises,” Dr. Fauci said. “Zika is the first mosquito-borne infection that can result in a congenital abnormality, the first mosquito-borne infection that can be sexually transmitted, and now we’re learning more about this problem, which is the reason why it’s very important for us to develop a vaccine.”

A phase I trial of a DNA vaccine developed by the NIH Vaccine Research Center has reached its enrollment goal of 80 patients age 18-35 years. Initial results are expected sometime in the first quarter of 2017. A phase II trial in the United States and Puerto Rico is expected to launch soon.

Dr. Fauci closed his presentation by sharing lessons learned from previous pandemics.

The first lesson is that global surveillance is required. “Namely, know what’s going on in real time,” he said. “That has to be linked to transparency and communication. So that if something happens in China, we don’t find out about it months later, but we know about it in real time.”

Infrastructure and capacity building are also important. “The lack of capacity in West Africa can ultimately have an indirect impact on us here in the United States,” he said.

“Finally, we need to coordinate and collaborate; we need adaptable platforms for vaccines,” Dr. Fauci cautioned. “Importantly, we need a stable funding mechanism such as a public health emergency fund so that we do not have to go scrambling before the Congress when we need emergency funds.”
 
 

 

 

SAN DIEGO– Reflecting on his 33-year career as director of the National Institute of Allergy and Infectious Diseases, Anthony S. Fauci, MD, can say one thing for certain: Emerging and re-emerging infectious diseases in the continental United States are here to stay.

In an article that he and his colleagues published in the Lancet in 2008, they used the term “perpetual challenge” to describe emerging infections, a descriptor that resonates with him to this day.

Dr. Anthony S. Fauci
“When you think about emerging and re-emerging infectious diseases, they have always been with us, they are clearly with us now, and we will certainly be seeing them in the future in an absolute predictable way,” Dr. Fauci told a capacity crowd during a keynote lecture on the opening day of the annual meeting of the American College of Physicians.

Global examples of emerging and re-emerging infectious diseases he discussed include dengue, West Nile virus, chikungunya, and carbapenem-resistant Enterobacteriaceae, “which is becoming a progressively more serious problem in hospitalized patients,” said Dr. Fauci, who is also chief of the NIAID Laboratory of Immunoregulation.

“We had a serious challenge with that at our own clinical center in Bethesda just a few years ago,” he noted. Numerous cases of antimicrobial resistance in methicillin-resistant Staphylococcus aureus, Clostridium difficile, and Neisseria gonorrhoeae have been reported.

Dr. Fauci described the Ebola outbreak as “a globally important disease that had ripple effects in the United States that were unpredicted,” referring to the case of the infected man who traveled from Monrovia to Dallas on Sept. 19, 2014, and developed Ebola symptoms 5 days later. Between 2014 and 2016, there were 28,616 cases and 11,310 deaths combined in the countries of Guinea, Sierra Leone, and Liberia.

“There is virtually no health care system in those three countries,” he said. “There’s a distrust in authority, and anything we tried to do as a global health [effort] made things worse. What we’re trying to do now is built sustainable health care issues in countries that don’t have it.”

Of particular concern to public health officials worldwide is getting a lid on Zika virus, a mosquito-borne illness that can be passed from a pregnant woman to her fetus and cause an increased risk of microcephaly, particularly during the first trimester.

“Not only is there microcephaly, there’s a whole host of abnormalities that involve hearing loss, visual abnormalities, and a variety of other issues,” Dr. Fauci said. “There are about 50 countries in the Americas and the Caribbean that have Zika virus transmission.”

According to data from the Centers for Disease Control and Prevention, from Jan. 1, 2015, to March 29, 2017, there were 5,182 reported cases of Zika virus disease in the 50 states and the District of Columbia. The majority of those (4,886) were travel associated, 222 were locally acquired mosquito-borne, 45 were sexually transmitted, 27 congenital, 1 was laboratory acquired, and 1 was unknown.

At the same time, there have been 38,303 cases in the U.S. territories. Of those, 38,156 were locally acquired, and 147 were travel associated. “That’s why there’s such an intense effort to develop a Zika vaccine,” he said.

According to the CDC, as of March 15, 2017, there are 265 cases of locally transmitted cases in Florida: 216 by mosquito and the rest by sexual transmission. “Talk about surprises,” Dr. Fauci said. “Zika is the first mosquito-borne infection that can result in a congenital abnormality, the first mosquito-borne infection that can be sexually transmitted, and now we’re learning more about this problem, which is the reason why it’s very important for us to develop a vaccine.”

A phase I trial of a DNA vaccine developed by the NIH Vaccine Research Center has reached its enrollment goal of 80 patients age 18-35 years. Initial results are expected sometime in the first quarter of 2017. A phase II trial in the United States and Puerto Rico is expected to launch soon.

Dr. Fauci closed his presentation by sharing lessons learned from previous pandemics.

The first lesson is that global surveillance is required. “Namely, know what’s going on in real time,” he said. “That has to be linked to transparency and communication. So that if something happens in China, we don’t find out about it months later, but we know about it in real time.”

Infrastructure and capacity building are also important. “The lack of capacity in West Africa can ultimately have an indirect impact on us here in the United States,” he said.

“Finally, we need to coordinate and collaborate; we need adaptable platforms for vaccines,” Dr. Fauci cautioned. “Importantly, we need a stable funding mechanism such as a public health emergency fund so that we do not have to go scrambling before the Congress when we need emergency funds.”
 
 

 

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Fellow in Hospital Medicine designation symbolizes physician commitment to hospital medicine

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Umesh Sharma, MD, MBA, FHM, utilizes SHM leadership resources in practice at Mayo Clinic

Editor’s note: Each month, SHM puts the spotlight on some of our most active members who are making substantial contributions to hospital medicine. Log on to www.hospitalmedicine.org/getinvolved for more information on how you can lend your expertise to help SHM improve the care of hospitalized patients.

This month, The Hospitalist spotlights Umesh Sharma, MD, MBA, FHM, chair of the division of community hospital medicine at Mayo Clinic. Umesh became a Fellow in Hospital Medicine in 2016 and has found great value in attending the annual meeting each year.

What inspired you to join SHM, and what prompted you to apply for the Fellow in Hospital Medicine designation?

Dr. Umesh Sharma
I initially heard about SHM through colleagues when discussing their educational experience at SHM’s annual meetings. SHM promotes the interests of hospitalists and hospital medicine as a growing specialty, and becoming a member provided me with opportunities to connect and network with my peers both virtually and in person. For me, becoming a Fellow in Hospital Medicine was a natural progression of my membership; it is an embodiment of dedication and commitment to the hospital medicine movement that also helps distinguish me as a leader in the field.
 

How did you use SHM resources to help you in your pathway to Fellowship in Hospital Medicine?

There are specific eligibility requirements for the Fellow in Hospital Medicine designation, including a minimum of 5 years as a practicing hospitalist and 3 years as an SHM member, endorsements from two active members, regular meeting attendance and more. SHM provides a checklist for Fellow applicants online and an FAQ page to make the application process as user-friendly as possible. A friend of mine, Dr. Deepak Pahuja, is a Fellow, and he mentored me throughout the process.
 

How else has SHM contributed to your professional growth and provided you with tools you need to lead hospitalists at Mayo Clinic?

There are many resources that SHM provides to help with professional growth both online and at in-person meetings. I referenced the Key Principles and Characteristics of an Effective Hospital Medicine Group, an online assessment guide, in my role as department chair in La Crosse, Wisc., to resurrect a hospital medicine group, secure resources, hire career hospitalists, and create a well-functioning, well-managed, efficient, effective group with zero turnover during a span of 4 years.

By focusing on the leadership track at annual meetings, I have been able to gain knowledge on proven leadership strategies and enhance my skills, which I have applied on many occasions in my practice. Being able to talk to multisite hospital medicine group colleagues in person helped me to learn best practices in how to successfully manage the integration of 14 hospital medicine community hospital sites across Mayo Midwest. I was able to get ideas on effectively understanding and managing challenges, like recruitment retention, staffing to workloads, and scope of practice, among others. SHM promotes peer-to-peer learning and has helped me share and learn best practices as it relates to the clinical and nonclinical aspect of the practice of hospital medicine.
 

What one piece of advice would you give fellow hospitalists during this transformational time in health care?

This is an exciting time in health care, especially for hospital medicine professionals, who are at the forefront of providing value-based care. Every change is an opportunity to improve and innovate; the best way to handle change is to embrace and lead it.

Ms. Steele is SHM’s communications coordinator.

To apply for the Fellow in Hospital Medicine designation, visit www.hospitalmedicine.org/fellows.




 

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Umesh Sharma, MD, MBA, FHM, utilizes SHM leadership resources in practice at Mayo Clinic
Umesh Sharma, MD, MBA, FHM, utilizes SHM leadership resources in practice at Mayo Clinic

Editor’s note: Each month, SHM puts the spotlight on some of our most active members who are making substantial contributions to hospital medicine. Log on to www.hospitalmedicine.org/getinvolved for more information on how you can lend your expertise to help SHM improve the care of hospitalized patients.

This month, The Hospitalist spotlights Umesh Sharma, MD, MBA, FHM, chair of the division of community hospital medicine at Mayo Clinic. Umesh became a Fellow in Hospital Medicine in 2016 and has found great value in attending the annual meeting each year.

What inspired you to join SHM, and what prompted you to apply for the Fellow in Hospital Medicine designation?

Dr. Umesh Sharma
I initially heard about SHM through colleagues when discussing their educational experience at SHM’s annual meetings. SHM promotes the interests of hospitalists and hospital medicine as a growing specialty, and becoming a member provided me with opportunities to connect and network with my peers both virtually and in person. For me, becoming a Fellow in Hospital Medicine was a natural progression of my membership; it is an embodiment of dedication and commitment to the hospital medicine movement that also helps distinguish me as a leader in the field.
 

How did you use SHM resources to help you in your pathway to Fellowship in Hospital Medicine?

There are specific eligibility requirements for the Fellow in Hospital Medicine designation, including a minimum of 5 years as a practicing hospitalist and 3 years as an SHM member, endorsements from two active members, regular meeting attendance and more. SHM provides a checklist for Fellow applicants online and an FAQ page to make the application process as user-friendly as possible. A friend of mine, Dr. Deepak Pahuja, is a Fellow, and he mentored me throughout the process.
 

How else has SHM contributed to your professional growth and provided you with tools you need to lead hospitalists at Mayo Clinic?

There are many resources that SHM provides to help with professional growth both online and at in-person meetings. I referenced the Key Principles and Characteristics of an Effective Hospital Medicine Group, an online assessment guide, in my role as department chair in La Crosse, Wisc., to resurrect a hospital medicine group, secure resources, hire career hospitalists, and create a well-functioning, well-managed, efficient, effective group with zero turnover during a span of 4 years.

By focusing on the leadership track at annual meetings, I have been able to gain knowledge on proven leadership strategies and enhance my skills, which I have applied on many occasions in my practice. Being able to talk to multisite hospital medicine group colleagues in person helped me to learn best practices in how to successfully manage the integration of 14 hospital medicine community hospital sites across Mayo Midwest. I was able to get ideas on effectively understanding and managing challenges, like recruitment retention, staffing to workloads, and scope of practice, among others. SHM promotes peer-to-peer learning and has helped me share and learn best practices as it relates to the clinical and nonclinical aspect of the practice of hospital medicine.
 

What one piece of advice would you give fellow hospitalists during this transformational time in health care?

This is an exciting time in health care, especially for hospital medicine professionals, who are at the forefront of providing value-based care. Every change is an opportunity to improve and innovate; the best way to handle change is to embrace and lead it.

Ms. Steele is SHM’s communications coordinator.

To apply for the Fellow in Hospital Medicine designation, visit www.hospitalmedicine.org/fellows.




 

Editor’s note: Each month, SHM puts the spotlight on some of our most active members who are making substantial contributions to hospital medicine. Log on to www.hospitalmedicine.org/getinvolved for more information on how you can lend your expertise to help SHM improve the care of hospitalized patients.

This month, The Hospitalist spotlights Umesh Sharma, MD, MBA, FHM, chair of the division of community hospital medicine at Mayo Clinic. Umesh became a Fellow in Hospital Medicine in 2016 and has found great value in attending the annual meeting each year.

What inspired you to join SHM, and what prompted you to apply for the Fellow in Hospital Medicine designation?

Dr. Umesh Sharma
I initially heard about SHM through colleagues when discussing their educational experience at SHM’s annual meetings. SHM promotes the interests of hospitalists and hospital medicine as a growing specialty, and becoming a member provided me with opportunities to connect and network with my peers both virtually and in person. For me, becoming a Fellow in Hospital Medicine was a natural progression of my membership; it is an embodiment of dedication and commitment to the hospital medicine movement that also helps distinguish me as a leader in the field.
 

How did you use SHM resources to help you in your pathway to Fellowship in Hospital Medicine?

There are specific eligibility requirements for the Fellow in Hospital Medicine designation, including a minimum of 5 years as a practicing hospitalist and 3 years as an SHM member, endorsements from two active members, regular meeting attendance and more. SHM provides a checklist for Fellow applicants online and an FAQ page to make the application process as user-friendly as possible. A friend of mine, Dr. Deepak Pahuja, is a Fellow, and he mentored me throughout the process.
 

How else has SHM contributed to your professional growth and provided you with tools you need to lead hospitalists at Mayo Clinic?

There are many resources that SHM provides to help with professional growth both online and at in-person meetings. I referenced the Key Principles and Characteristics of an Effective Hospital Medicine Group, an online assessment guide, in my role as department chair in La Crosse, Wisc., to resurrect a hospital medicine group, secure resources, hire career hospitalists, and create a well-functioning, well-managed, efficient, effective group with zero turnover during a span of 4 years.

By focusing on the leadership track at annual meetings, I have been able to gain knowledge on proven leadership strategies and enhance my skills, which I have applied on many occasions in my practice. Being able to talk to multisite hospital medicine group colleagues in person helped me to learn best practices in how to successfully manage the integration of 14 hospital medicine community hospital sites across Mayo Midwest. I was able to get ideas on effectively understanding and managing challenges, like recruitment retention, staffing to workloads, and scope of practice, among others. SHM promotes peer-to-peer learning and has helped me share and learn best practices as it relates to the clinical and nonclinical aspect of the practice of hospital medicine.
 

What one piece of advice would you give fellow hospitalists during this transformational time in health care?

This is an exciting time in health care, especially for hospital medicine professionals, who are at the forefront of providing value-based care. Every change is an opportunity to improve and innovate; the best way to handle change is to embrace and lead it.

Ms. Steele is SHM’s communications coordinator.

To apply for the Fellow in Hospital Medicine designation, visit www.hospitalmedicine.org/fellows.




 

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Immunotherapy exhibits antileukemic activity in high-risk patients

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Immunotherapy exhibits antileukemic activity in high-risk patients

B-cell precursor ALL

Blinatumomab has demonstrated activity in high-risk patients with Philadelphia chromosome-positive (Ph+) B-cell precursor acute lymphoblastic leukemia (BCP-ALL), according to research published in the Journal of Clinical Oncology.

This phase 2 trial enrolled patients with relapsed or refractory Ph+ BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor (TKI).

Blinatumomab produced a complete response (CR) in 31% of these patients, the median relapse-free survival was 6.7 months, and the median overall survival was 7.1 months.

The most common adverse events (AEs) were pyrexia, neurologic events, febrile neutropenia, and headache.

“Patients with Ph+ relapsed or refractory B-cell precursor ALL typically have lower remission rates, poor long-term prognosis, and shorter duration of remission than patients with Philadelphia chromosome-negative disease, and are especially in need of new treatment options beyond TKIs,” said study author Anthony Stein, MD, of City of Hope in Duarte, California.

“Results from this phase 2 study showed blinatumomab induced complete remission in these high-risk patients, regardless of prior TKI therapy or mutational status . . . .”

This study was supported by Amgen, the company developing and marketing blinatumomab.

The trial enrolled 45 patients with relapsed or refractory Ph+ BCP-ALL. Fifty-nine percent of patients had additional cytogenetic abnormalities. Forty-six percent had ABL1 kinase domain mutations, and 27% had the T315I mutation.

The patients’ median age was 55 (range, 23-78), and 55% were male. The median baseline bone marrow blast percentage was 80% (range, 6% to 98%).

Eighty-four percent of patients had received at least 2 prior TKIs. All patients were refractory to (56%), had relapsed on (33%), or progressed after (11%) TKI therapy. Forty-four percent of patients had undergone an allogeneic hematopoietic stem cell transplant (allo-HSCT).

The patients received blinatumomab in 28-day cycles by continuous intravenous infusion. The median number of cycles received was 2 (range, 1-5).

Efficacy

Thirty-six percent of patients (n=16) had a CR or CR with partial hematologic recovery (CRh) during the first 2 cycles of treatment. For 31% of patients (n=14), their best response was a CR.

Eighty-eight percent of patients who achieved a CR/CRh (n=14) achieved minimal residual disease (MRD) negativity.

Forty percent of patients with a T315I mutation had a CR/CRh (4/10), and all of these responders were MRD negative.

Seven responders (44%) went on to allo-HSCT, 6 of whom were transplant-naïve.

Eight of the 16 responders (50%) ultimately relapsed. Their median time to relapse was 6.7 months. Three patients relapsed during treatment, 2 relapsed without undergoing allo-HSCT, and 3 relapsed after allo-HSCT.

Seven responders (44%) were still alive and had not relapsed at last follow-up. The remaining responder died in CR after allo-HSCT.

The median relapse-free survival was 6.7 months, with or without censoring for allo-HSCT. And the median overall survival was 7.1 months, with or without censoring for allo-HSCT.

Safety

The most common AEs were pyrexia (58%), febrile neutropenia (40%), and headache (31%). Nearly half of patients (47%) had neurologic events.

Eighty-two percent of patients had grade 3 or higher treatment-emergent AEs. The most common were febrile neutropenia (27%), thrombocytopenia (22%), and anemia (16%).

Forty-four percent of patients had grade 3 or higher AEs that were considered possibly related to blinatumomab. The most common were febrile neutropenia and increased levels of alanine aminotransferase (11% each).

Five patients had fatal AEs—multiorgan failure, sepsis, septic shock, cerebral hemorrhage, and respiratory failure. The case of septic shock was considered related to treatment with blinatumomab.

Three patients developed cytokine release syndrome (all grade 1 or 2), but none of them had their treatment interrupted or discontinued as a result.

 

 

Three patients had grade 3 neurologic events, and 1 of these events (aphasia) required temporary treatment interruption. There were no grade 4 or 5 neurologic events.

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B-cell precursor ALL

Blinatumomab has demonstrated activity in high-risk patients with Philadelphia chromosome-positive (Ph+) B-cell precursor acute lymphoblastic leukemia (BCP-ALL), according to research published in the Journal of Clinical Oncology.

This phase 2 trial enrolled patients with relapsed or refractory Ph+ BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor (TKI).

Blinatumomab produced a complete response (CR) in 31% of these patients, the median relapse-free survival was 6.7 months, and the median overall survival was 7.1 months.

The most common adverse events (AEs) were pyrexia, neurologic events, febrile neutropenia, and headache.

“Patients with Ph+ relapsed or refractory B-cell precursor ALL typically have lower remission rates, poor long-term prognosis, and shorter duration of remission than patients with Philadelphia chromosome-negative disease, and are especially in need of new treatment options beyond TKIs,” said study author Anthony Stein, MD, of City of Hope in Duarte, California.

“Results from this phase 2 study showed blinatumomab induced complete remission in these high-risk patients, regardless of prior TKI therapy or mutational status . . . .”

This study was supported by Amgen, the company developing and marketing blinatumomab.

The trial enrolled 45 patients with relapsed or refractory Ph+ BCP-ALL. Fifty-nine percent of patients had additional cytogenetic abnormalities. Forty-six percent had ABL1 kinase domain mutations, and 27% had the T315I mutation.

The patients’ median age was 55 (range, 23-78), and 55% were male. The median baseline bone marrow blast percentage was 80% (range, 6% to 98%).

Eighty-four percent of patients had received at least 2 prior TKIs. All patients were refractory to (56%), had relapsed on (33%), or progressed after (11%) TKI therapy. Forty-four percent of patients had undergone an allogeneic hematopoietic stem cell transplant (allo-HSCT).

The patients received blinatumomab in 28-day cycles by continuous intravenous infusion. The median number of cycles received was 2 (range, 1-5).

Efficacy

Thirty-six percent of patients (n=16) had a CR or CR with partial hematologic recovery (CRh) during the first 2 cycles of treatment. For 31% of patients (n=14), their best response was a CR.

Eighty-eight percent of patients who achieved a CR/CRh (n=14) achieved minimal residual disease (MRD) negativity.

Forty percent of patients with a T315I mutation had a CR/CRh (4/10), and all of these responders were MRD negative.

Seven responders (44%) went on to allo-HSCT, 6 of whom were transplant-naïve.

Eight of the 16 responders (50%) ultimately relapsed. Their median time to relapse was 6.7 months. Three patients relapsed during treatment, 2 relapsed without undergoing allo-HSCT, and 3 relapsed after allo-HSCT.

Seven responders (44%) were still alive and had not relapsed at last follow-up. The remaining responder died in CR after allo-HSCT.

The median relapse-free survival was 6.7 months, with or without censoring for allo-HSCT. And the median overall survival was 7.1 months, with or without censoring for allo-HSCT.

Safety

The most common AEs were pyrexia (58%), febrile neutropenia (40%), and headache (31%). Nearly half of patients (47%) had neurologic events.

Eighty-two percent of patients had grade 3 or higher treatment-emergent AEs. The most common were febrile neutropenia (27%), thrombocytopenia (22%), and anemia (16%).

Forty-four percent of patients had grade 3 or higher AEs that were considered possibly related to blinatumomab. The most common were febrile neutropenia and increased levels of alanine aminotransferase (11% each).

Five patients had fatal AEs—multiorgan failure, sepsis, septic shock, cerebral hemorrhage, and respiratory failure. The case of septic shock was considered related to treatment with blinatumomab.

Three patients developed cytokine release syndrome (all grade 1 or 2), but none of them had their treatment interrupted or discontinued as a result.

 

 

Three patients had grade 3 neurologic events, and 1 of these events (aphasia) required temporary treatment interruption. There were no grade 4 or 5 neurologic events.

B-cell precursor ALL

Blinatumomab has demonstrated activity in high-risk patients with Philadelphia chromosome-positive (Ph+) B-cell precursor acute lymphoblastic leukemia (BCP-ALL), according to research published in the Journal of Clinical Oncology.

This phase 2 trial enrolled patients with relapsed or refractory Ph+ BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor (TKI).

Blinatumomab produced a complete response (CR) in 31% of these patients, the median relapse-free survival was 6.7 months, and the median overall survival was 7.1 months.

The most common adverse events (AEs) were pyrexia, neurologic events, febrile neutropenia, and headache.

“Patients with Ph+ relapsed or refractory B-cell precursor ALL typically have lower remission rates, poor long-term prognosis, and shorter duration of remission than patients with Philadelphia chromosome-negative disease, and are especially in need of new treatment options beyond TKIs,” said study author Anthony Stein, MD, of City of Hope in Duarte, California.

“Results from this phase 2 study showed blinatumomab induced complete remission in these high-risk patients, regardless of prior TKI therapy or mutational status . . . .”

This study was supported by Amgen, the company developing and marketing blinatumomab.

The trial enrolled 45 patients with relapsed or refractory Ph+ BCP-ALL. Fifty-nine percent of patients had additional cytogenetic abnormalities. Forty-six percent had ABL1 kinase domain mutations, and 27% had the T315I mutation.

The patients’ median age was 55 (range, 23-78), and 55% were male. The median baseline bone marrow blast percentage was 80% (range, 6% to 98%).

Eighty-four percent of patients had received at least 2 prior TKIs. All patients were refractory to (56%), had relapsed on (33%), or progressed after (11%) TKI therapy. Forty-four percent of patients had undergone an allogeneic hematopoietic stem cell transplant (allo-HSCT).

The patients received blinatumomab in 28-day cycles by continuous intravenous infusion. The median number of cycles received was 2 (range, 1-5).

Efficacy

Thirty-six percent of patients (n=16) had a CR or CR with partial hematologic recovery (CRh) during the first 2 cycles of treatment. For 31% of patients (n=14), their best response was a CR.

Eighty-eight percent of patients who achieved a CR/CRh (n=14) achieved minimal residual disease (MRD) negativity.

Forty percent of patients with a T315I mutation had a CR/CRh (4/10), and all of these responders were MRD negative.

Seven responders (44%) went on to allo-HSCT, 6 of whom were transplant-naïve.

Eight of the 16 responders (50%) ultimately relapsed. Their median time to relapse was 6.7 months. Three patients relapsed during treatment, 2 relapsed without undergoing allo-HSCT, and 3 relapsed after allo-HSCT.

Seven responders (44%) were still alive and had not relapsed at last follow-up. The remaining responder died in CR after allo-HSCT.

The median relapse-free survival was 6.7 months, with or without censoring for allo-HSCT. And the median overall survival was 7.1 months, with or without censoring for allo-HSCT.

Safety

The most common AEs were pyrexia (58%), febrile neutropenia (40%), and headache (31%). Nearly half of patients (47%) had neurologic events.

Eighty-two percent of patients had grade 3 or higher treatment-emergent AEs. The most common were febrile neutropenia (27%), thrombocytopenia (22%), and anemia (16%).

Forty-four percent of patients had grade 3 or higher AEs that were considered possibly related to blinatumomab. The most common were febrile neutropenia and increased levels of alanine aminotransferase (11% each).

Five patients had fatal AEs—multiorgan failure, sepsis, septic shock, cerebral hemorrhage, and respiratory failure. The case of septic shock was considered related to treatment with blinatumomab.

Three patients developed cytokine release syndrome (all grade 1 or 2), but none of them had their treatment interrupted or discontinued as a result.

 

 

Three patients had grade 3 neurologic events, and 1 of these events (aphasia) required temporary treatment interruption. There were no grade 4 or 5 neurologic events.

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FDA lifts partial clinical hold for some selinexor trials

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Photo by Esther Dyson
Preparing drug for a trial

The US Food and Drug Administration (FDA) has lifted the partial clinical hold on trials of selinexor (KPT-330) in patients with hematologic malignancies.

The partial hold, which was announced on March 10, was placed on all trials of the drug, including those in patients with solid tumor malignancies.

The hold meant that no new patients could be enrolled in selinexor trials.

Patients who were already enrolled and had stable disease or better could remain on selinexor therapy.

Now, the FDA has lifted the hold on trials of patients with hematologic malignancies, so new patients can be enrolled in these trials and begin receiving selinexor.

The FDA had placed the hold due to a lack of information in the investigator’s brochure, including an incomplete list of serious adverse events associated with selinexor.

Karyopharm Therapeutics Inc., the company developing selinexor, noted that the hold was not the result of patient deaths or any new information regarding the safety profile of selinexor.

In response to the hold, Karyopharm amended the investigator’s brochure, updated informed consent documents, and submitted the documents to the FDA.

“The Karyopharm team worked diligently to update and submit the required documents to the FDA, which allowed the hematology division to expeditiously remove the partial clinical hold,” said Michael G. Kauffman, MD, PhD, chief executive officer of Karyopharm.

“We anticipate that the solid tumor divisions will follow suit shortly. Patient enrollment is again underway in our hematologic oncology studies. Our previously disclosed enrollment rates and timelines for both ongoing and planned trials are not expected to be materially impacted.”

About selinexor

Selinexor is a first-in-class, oral, selective inhibitor of nuclear export compound. The drug functions by inhibiting the nuclear export protein XPO1 (also called CRM1).

This leads to the accumulation of tumor suppressor proteins in the cell nucleus, which subsequently reinitiates and amplifies their tumor suppressor function. This is thought to prompt apoptosis in cancer cells while largely sparing normal cells.

To date, more than 1900 patients have been treated with selinexor.

The drug is currently being evaluated in clinical trials across multiple cancer indications, including in acute myeloid leukemia (SOPRA), in multiple myeloma in combination with low-dose dexamethasone (STORM) and backbone therapies (STOMP), as well as in diffuse large B-cell lymphoma (SADAL). 

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Photo by Esther Dyson
Preparing drug for a trial

The US Food and Drug Administration (FDA) has lifted the partial clinical hold on trials of selinexor (KPT-330) in patients with hematologic malignancies.

The partial hold, which was announced on March 10, was placed on all trials of the drug, including those in patients with solid tumor malignancies.

The hold meant that no new patients could be enrolled in selinexor trials.

Patients who were already enrolled and had stable disease or better could remain on selinexor therapy.

Now, the FDA has lifted the hold on trials of patients with hematologic malignancies, so new patients can be enrolled in these trials and begin receiving selinexor.

The FDA had placed the hold due to a lack of information in the investigator’s brochure, including an incomplete list of serious adverse events associated with selinexor.

Karyopharm Therapeutics Inc., the company developing selinexor, noted that the hold was not the result of patient deaths or any new information regarding the safety profile of selinexor.

In response to the hold, Karyopharm amended the investigator’s brochure, updated informed consent documents, and submitted the documents to the FDA.

“The Karyopharm team worked diligently to update and submit the required documents to the FDA, which allowed the hematology division to expeditiously remove the partial clinical hold,” said Michael G. Kauffman, MD, PhD, chief executive officer of Karyopharm.

“We anticipate that the solid tumor divisions will follow suit shortly. Patient enrollment is again underway in our hematologic oncology studies. Our previously disclosed enrollment rates and timelines for both ongoing and planned trials are not expected to be materially impacted.”

About selinexor

Selinexor is a first-in-class, oral, selective inhibitor of nuclear export compound. The drug functions by inhibiting the nuclear export protein XPO1 (also called CRM1).

This leads to the accumulation of tumor suppressor proteins in the cell nucleus, which subsequently reinitiates and amplifies their tumor suppressor function. This is thought to prompt apoptosis in cancer cells while largely sparing normal cells.

To date, more than 1900 patients have been treated with selinexor.

The drug is currently being evaluated in clinical trials across multiple cancer indications, including in acute myeloid leukemia (SOPRA), in multiple myeloma in combination with low-dose dexamethasone (STORM) and backbone therapies (STOMP), as well as in diffuse large B-cell lymphoma (SADAL). 

Photo by Esther Dyson
Preparing drug for a trial

The US Food and Drug Administration (FDA) has lifted the partial clinical hold on trials of selinexor (KPT-330) in patients with hematologic malignancies.

The partial hold, which was announced on March 10, was placed on all trials of the drug, including those in patients with solid tumor malignancies.

The hold meant that no new patients could be enrolled in selinexor trials.

Patients who were already enrolled and had stable disease or better could remain on selinexor therapy.

Now, the FDA has lifted the hold on trials of patients with hematologic malignancies, so new patients can be enrolled in these trials and begin receiving selinexor.

The FDA had placed the hold due to a lack of information in the investigator’s brochure, including an incomplete list of serious adverse events associated with selinexor.

Karyopharm Therapeutics Inc., the company developing selinexor, noted that the hold was not the result of patient deaths or any new information regarding the safety profile of selinexor.

In response to the hold, Karyopharm amended the investigator’s brochure, updated informed consent documents, and submitted the documents to the FDA.

“The Karyopharm team worked diligently to update and submit the required documents to the FDA, which allowed the hematology division to expeditiously remove the partial clinical hold,” said Michael G. Kauffman, MD, PhD, chief executive officer of Karyopharm.

“We anticipate that the solid tumor divisions will follow suit shortly. Patient enrollment is again underway in our hematologic oncology studies. Our previously disclosed enrollment rates and timelines for both ongoing and planned trials are not expected to be materially impacted.”

About selinexor

Selinexor is a first-in-class, oral, selective inhibitor of nuclear export compound. The drug functions by inhibiting the nuclear export protein XPO1 (also called CRM1).

This leads to the accumulation of tumor suppressor proteins in the cell nucleus, which subsequently reinitiates and amplifies their tumor suppressor function. This is thought to prompt apoptosis in cancer cells while largely sparing normal cells.

To date, more than 1900 patients have been treated with selinexor.

The drug is currently being evaluated in clinical trials across multiple cancer indications, including in acute myeloid leukemia (SOPRA), in multiple myeloma in combination with low-dose dexamethasone (STORM) and backbone therapies (STOMP), as well as in diffuse large B-cell lymphoma (SADAL). 

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Phase 2 study of daratumumab in NHL won’t proceed

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Phase 2 study of daratumumab in NHL won’t proceed

 

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Daratumumab (Darzalex)

 

The phase 2 CARINA study of daratumumab in non-Hodgkin lymphoma (NHL) will not proceed to stage 2, according to Genmab A/S and Janssen Biotech, Inc.

 

In this study, researchers have been investigating daratumumab monotherapy in patients with relapsed or refractory follicular lymphoma (FL), diffuse large B-cell lymphoma (DLBCL), or mantle cell lymphoma (MCL).

 

Researchers planned to enroll up to 210 patients in this trial in 2 stages. Stage 1 was designed to provide a preliminary assessment of activity.

 

The goal of stage 2 was to further evaluate the safety and efficacy of daratumumab in the 3 patient groups.

 

Stage 2 will not proceed because a data review showed the FL and DLBCL cohorts did not reach the predefined futility thresholds, which were overall response rates of 50% and 30%, respectively. In the MCL cohort, the overall response rate was not evaluable due to slow recruitment.

 

The decision regarding this study has no impact on other ongoing or planned studies with daratumumab.

 

“While we hoped that daratumumab as a monotherapy could potentially provide a new treatment option in NHL patients with a high unmet medical need, the preliminary activity profile seen was not sufficient for the study to continue,” said Jan van de Winkel, PhD, chief executive officer of Genmab.

 

“Daratumumab is still being investigated in a number of indications, including multiple myeloma and other hematological cancers, such as NK/T-cell lymphoma and myelodysplastic syndrome, as well as in solid tumors.”

 

About daratumumab

 

Daratumumab is a human IgG1k monoclonal antibody that binds to the CD38 molecule.

 

In the US, daratumumab is approved for use in combination with lenalidomide and dexamethasone, or bortezomib and dexamethasone, for the treatment of patients with multiple myeloma who have received at least 1 prior therapy.

 

Daratumumab monotherapy is approved in the US for patients with multiple myeloma who have received at least 3 prior lines of therapy, including a proteasome inhibitor and an immunomodulatory agent, or who are double-refractory to a proteasome inhibitor and an immunomodulatory agent.

 

Daratumumab is being developed by Janssen Biotech, Inc. under an exclusive worldwide license from Genmab.

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Photo courtesy of Janssen
Daratumumab (Darzalex)

 

The phase 2 CARINA study of daratumumab in non-Hodgkin lymphoma (NHL) will not proceed to stage 2, according to Genmab A/S and Janssen Biotech, Inc.

 

In this study, researchers have been investigating daratumumab monotherapy in patients with relapsed or refractory follicular lymphoma (FL), diffuse large B-cell lymphoma (DLBCL), or mantle cell lymphoma (MCL).

 

Researchers planned to enroll up to 210 patients in this trial in 2 stages. Stage 1 was designed to provide a preliminary assessment of activity.

 

The goal of stage 2 was to further evaluate the safety and efficacy of daratumumab in the 3 patient groups.

 

Stage 2 will not proceed because a data review showed the FL and DLBCL cohorts did not reach the predefined futility thresholds, which were overall response rates of 50% and 30%, respectively. In the MCL cohort, the overall response rate was not evaluable due to slow recruitment.

 

The decision regarding this study has no impact on other ongoing or planned studies with daratumumab.

 

“While we hoped that daratumumab as a monotherapy could potentially provide a new treatment option in NHL patients with a high unmet medical need, the preliminary activity profile seen was not sufficient for the study to continue,” said Jan van de Winkel, PhD, chief executive officer of Genmab.

 

“Daratumumab is still being investigated in a number of indications, including multiple myeloma and other hematological cancers, such as NK/T-cell lymphoma and myelodysplastic syndrome, as well as in solid tumors.”

 

About daratumumab

 

Daratumumab is a human IgG1k monoclonal antibody that binds to the CD38 molecule.

 

In the US, daratumumab is approved for use in combination with lenalidomide and dexamethasone, or bortezomib and dexamethasone, for the treatment of patients with multiple myeloma who have received at least 1 prior therapy.

 

Daratumumab monotherapy is approved in the US for patients with multiple myeloma who have received at least 3 prior lines of therapy, including a proteasome inhibitor and an immunomodulatory agent, or who are double-refractory to a proteasome inhibitor and an immunomodulatory agent.

 

Daratumumab is being developed by Janssen Biotech, Inc. under an exclusive worldwide license from Genmab.

 

Photo courtesy of Janssen
Daratumumab (Darzalex)

 

The phase 2 CARINA study of daratumumab in non-Hodgkin lymphoma (NHL) will not proceed to stage 2, according to Genmab A/S and Janssen Biotech, Inc.

 

In this study, researchers have been investigating daratumumab monotherapy in patients with relapsed or refractory follicular lymphoma (FL), diffuse large B-cell lymphoma (DLBCL), or mantle cell lymphoma (MCL).

 

Researchers planned to enroll up to 210 patients in this trial in 2 stages. Stage 1 was designed to provide a preliminary assessment of activity.

 

The goal of stage 2 was to further evaluate the safety and efficacy of daratumumab in the 3 patient groups.

 

Stage 2 will not proceed because a data review showed the FL and DLBCL cohorts did not reach the predefined futility thresholds, which were overall response rates of 50% and 30%, respectively. In the MCL cohort, the overall response rate was not evaluable due to slow recruitment.

 

The decision regarding this study has no impact on other ongoing or planned studies with daratumumab.

 

“While we hoped that daratumumab as a monotherapy could potentially provide a new treatment option in NHL patients with a high unmet medical need, the preliminary activity profile seen was not sufficient for the study to continue,” said Jan van de Winkel, PhD, chief executive officer of Genmab.

 

“Daratumumab is still being investigated in a number of indications, including multiple myeloma and other hematological cancers, such as NK/T-cell lymphoma and myelodysplastic syndrome, as well as in solid tumors.”

 

About daratumumab

 

Daratumumab is a human IgG1k monoclonal antibody that binds to the CD38 molecule.

 

In the US, daratumumab is approved for use in combination with lenalidomide and dexamethasone, or bortezomib and dexamethasone, for the treatment of patients with multiple myeloma who have received at least 1 prior therapy.

 

Daratumumab monotherapy is approved in the US for patients with multiple myeloma who have received at least 3 prior lines of therapy, including a proteasome inhibitor and an immunomodulatory agent, or who are double-refractory to a proteasome inhibitor and an immunomodulatory agent.

 

Daratumumab is being developed by Janssen Biotech, Inc. under an exclusive worldwide license from Genmab.

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FDA grants priority review to sBLA for blinatumomab

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Vials of blinatumomab powder and solution for infusion

The US Food and Drug Administration (FDA) has accepted for priority review the supplemental biologics license application (sBLA) for blinatumomab (Blincyto®).

The aim of this application is to expand the indication for blinatumomab to include all patients with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (BCP-ALL) and to convert blinatumomab’s current accelerated approval to a full approval.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The Prescription Drug User Fee Act target action date for the blinatumomab sBLA is August 14, 2017.

About blinatumomab

Blinatumomab is a bispecific, CD19-directed, CD3 T-cell engager (BiTE®) antibody construct that binds specifically to CD19 expressed on the surface of cells of B-lineage origin and CD3 expressed on the surface of T cells.

Blinatumomab currently has accelerated approval in the US as a treatment for adult and pediatric patients with Philadelphia chromosome-negative (Ph-) relapsed or refractory BCP-ALL.

The FDA-approved prescribing information for blinatumomab includes a boxed warning detailing the risk of cytokine release syndrome and neurologic toxicities.

Blinatumomab is also under a Risk Evaluation and Mitigation Strategy program in the US intended to inform healthcare providers about these risks.

Blinatumomab is being developed and marketed by Amgen.

About the sBLA

With this sBLA, Amgen is seeking to make blinatumomab available as a treatment for patients with Philadelphia chromosome-positive (Ph+) relapsed/refractory BCP-ALL (as well as Ph-).

To this end, the application includes data from the ALCANTARA study, which were just published in the Journal of Clinical Oncology.

In this trial, researchers evaluated blinatumomab in adults with Ph+ relapsed/refractory BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor.

Thirty-six percent of patients achieved a complete response or complete response with partial hematologic recovery within the first 2 cycles of blinatumomab treatment. Of these patients, 88% were minimal residual disease negative.

The most frequent adverse events (AEs) in this trial were pyrexia (58%), neurologic events (47%), febrile neutropenia (40%), and headache (31%). Three patients had grade 1/2 cytokine release syndrome, and 3 patients had grade 3 neurologic AEs.

The sBLA also includes overall survival (OS) data from the phase 3 TOWER trial, which is intended to support the conversion of blinatumomab’s accelerated approval to a full approval.

Results from the TOWER trial were recently published in NEJM.

In this study, researchers compared blinatumomab to standard of care (SOC) chemotherapy (4 different regimens) in adults with Ph- relapsed/refractory BCP-ALL.

Blinatumomab produced higher response rates and nearly doubled OS compared to SOC. The median OS was 7.7 months in the blinatumomab arm and 4 months in the SOC arm. The hazard ratio for death was 0.71 (P=0.012).

The incidence of grade 3 or higher AEs was higher in the SOC arm, but the incidence of serious AEs was higher in the blinatumomab arm.

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Photo courtesy of Amgen
Vials of blinatumomab powder and solution for infusion

The US Food and Drug Administration (FDA) has accepted for priority review the supplemental biologics license application (sBLA) for blinatumomab (Blincyto®).

The aim of this application is to expand the indication for blinatumomab to include all patients with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (BCP-ALL) and to convert blinatumomab’s current accelerated approval to a full approval.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The Prescription Drug User Fee Act target action date for the blinatumomab sBLA is August 14, 2017.

About blinatumomab

Blinatumomab is a bispecific, CD19-directed, CD3 T-cell engager (BiTE®) antibody construct that binds specifically to CD19 expressed on the surface of cells of B-lineage origin and CD3 expressed on the surface of T cells.

Blinatumomab currently has accelerated approval in the US as a treatment for adult and pediatric patients with Philadelphia chromosome-negative (Ph-) relapsed or refractory BCP-ALL.

The FDA-approved prescribing information for blinatumomab includes a boxed warning detailing the risk of cytokine release syndrome and neurologic toxicities.

Blinatumomab is also under a Risk Evaluation and Mitigation Strategy program in the US intended to inform healthcare providers about these risks.

Blinatumomab is being developed and marketed by Amgen.

About the sBLA

With this sBLA, Amgen is seeking to make blinatumomab available as a treatment for patients with Philadelphia chromosome-positive (Ph+) relapsed/refractory BCP-ALL (as well as Ph-).

To this end, the application includes data from the ALCANTARA study, which were just published in the Journal of Clinical Oncology.

In this trial, researchers evaluated blinatumomab in adults with Ph+ relapsed/refractory BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor.

Thirty-six percent of patients achieved a complete response or complete response with partial hematologic recovery within the first 2 cycles of blinatumomab treatment. Of these patients, 88% were minimal residual disease negative.

The most frequent adverse events (AEs) in this trial were pyrexia (58%), neurologic events (47%), febrile neutropenia (40%), and headache (31%). Three patients had grade 1/2 cytokine release syndrome, and 3 patients had grade 3 neurologic AEs.

The sBLA also includes overall survival (OS) data from the phase 3 TOWER trial, which is intended to support the conversion of blinatumomab’s accelerated approval to a full approval.

Results from the TOWER trial were recently published in NEJM.

In this study, researchers compared blinatumomab to standard of care (SOC) chemotherapy (4 different regimens) in adults with Ph- relapsed/refractory BCP-ALL.

Blinatumomab produced higher response rates and nearly doubled OS compared to SOC. The median OS was 7.7 months in the blinatumomab arm and 4 months in the SOC arm. The hazard ratio for death was 0.71 (P=0.012).

The incidence of grade 3 or higher AEs was higher in the SOC arm, but the incidence of serious AEs was higher in the blinatumomab arm.

Photo courtesy of Amgen
Vials of blinatumomab powder and solution for infusion

The US Food and Drug Administration (FDA) has accepted for priority review the supplemental biologics license application (sBLA) for blinatumomab (Blincyto®).

The aim of this application is to expand the indication for blinatumomab to include all patients with relapsed or refractory B-cell precursor acute lymphoblastic leukemia (BCP-ALL) and to convert blinatumomab’s current accelerated approval to a full approval.

The FDA grants priority review to applications for products that may provide significant improvements in the treatment, diagnosis, or prevention of serious conditions.

The agency’s goal is to take action on a priority review application within 6 months of receiving it, rather than the standard 10 months.

The Prescription Drug User Fee Act target action date for the blinatumomab sBLA is August 14, 2017.

About blinatumomab

Blinatumomab is a bispecific, CD19-directed, CD3 T-cell engager (BiTE®) antibody construct that binds specifically to CD19 expressed on the surface of cells of B-lineage origin and CD3 expressed on the surface of T cells.

Blinatumomab currently has accelerated approval in the US as a treatment for adult and pediatric patients with Philadelphia chromosome-negative (Ph-) relapsed or refractory BCP-ALL.

The FDA-approved prescribing information for blinatumomab includes a boxed warning detailing the risk of cytokine release syndrome and neurologic toxicities.

Blinatumomab is also under a Risk Evaluation and Mitigation Strategy program in the US intended to inform healthcare providers about these risks.

Blinatumomab is being developed and marketed by Amgen.

About the sBLA

With this sBLA, Amgen is seeking to make blinatumomab available as a treatment for patients with Philadelphia chromosome-positive (Ph+) relapsed/refractory BCP-ALL (as well as Ph-).

To this end, the application includes data from the ALCANTARA study, which were just published in the Journal of Clinical Oncology.

In this trial, researchers evaluated blinatumomab in adults with Ph+ relapsed/refractory BCP-ALL who had failed treatment with at least 1 tyrosine kinase inhibitor.

Thirty-six percent of patients achieved a complete response or complete response with partial hematologic recovery within the first 2 cycles of blinatumomab treatment. Of these patients, 88% were minimal residual disease negative.

The most frequent adverse events (AEs) in this trial were pyrexia (58%), neurologic events (47%), febrile neutropenia (40%), and headache (31%). Three patients had grade 1/2 cytokine release syndrome, and 3 patients had grade 3 neurologic AEs.

The sBLA also includes overall survival (OS) data from the phase 3 TOWER trial, which is intended to support the conversion of blinatumomab’s accelerated approval to a full approval.

Results from the TOWER trial were recently published in NEJM.

In this study, researchers compared blinatumomab to standard of care (SOC) chemotherapy (4 different regimens) in adults with Ph- relapsed/refractory BCP-ALL.

Blinatumomab produced higher response rates and nearly doubled OS compared to SOC. The median OS was 7.7 months in the blinatumomab arm and 4 months in the SOC arm. The hazard ratio for death was 0.71 (P=0.012).

The incidence of grade 3 or higher AEs was higher in the SOC arm, but the incidence of serious AEs was higher in the blinatumomab arm.

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Can Phone Coaching Motivate Veterans to Try Preventive Care?

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To get more veterans engaged in preventative health care, the VHA now offers telephone-based coaching services.

The VHA offers several preventive care programs to veterans who are at high risk for various chronic illnesses: For instance, 20% of veterans smoke, and > 70% of VHA patients are overweight.

Although those programs are well supported and have strong evidence for effectiveness, they’re underused, say researchers from Durham VAMC and Duke University in North Carolina, VA Ann Arbor Healthcare System in Michigan, and VA Salt Lake City Center for Informatics Decision Enhancement and Surveillance and University of Utah. The VHA’s MOVE! Program produced significant weight loss among participants—the only problem was that < 10% of eligible veterans actually joined.

The researchers conducted the ACTIVATE trial, which involved a web-based health risk assessment (HRA) coupled with a health coaching intervention to link veterans to a local prevention program. In the study, veterans completed an online HRA. The researchers then tested whether 2 telephone-based coaching sessions were more effective in getting the veterans to enroll in prevention programs than did completing the HRA.

The coaching was not designed to change behavior but specifically aimed at helping veterans set a “first step” goal by choosing a program to enroll in that aligned with their values and preferences as well as risk factors highlighted by their HRA surveys.

The results aren’t in, but the researchers expect their findings to help the VHA implement its plan to engage veterans in preventive health care. Their “robustly designed trial,” they say, “will add valuable knowledge at a critical time when VHA and other health systems are working to understand how to effectively incorporate HRA findings into the busy clinic flow of primary care.”

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To get more veterans engaged in preventative health care, the VHA now offers telephone-based coaching services.
To get more veterans engaged in preventative health care, the VHA now offers telephone-based coaching services.

The VHA offers several preventive care programs to veterans who are at high risk for various chronic illnesses: For instance, 20% of veterans smoke, and > 70% of VHA patients are overweight.

Although those programs are well supported and have strong evidence for effectiveness, they’re underused, say researchers from Durham VAMC and Duke University in North Carolina, VA Ann Arbor Healthcare System in Michigan, and VA Salt Lake City Center for Informatics Decision Enhancement and Surveillance and University of Utah. The VHA’s MOVE! Program produced significant weight loss among participants—the only problem was that < 10% of eligible veterans actually joined.

The researchers conducted the ACTIVATE trial, which involved a web-based health risk assessment (HRA) coupled with a health coaching intervention to link veterans to a local prevention program. In the study, veterans completed an online HRA. The researchers then tested whether 2 telephone-based coaching sessions were more effective in getting the veterans to enroll in prevention programs than did completing the HRA.

The coaching was not designed to change behavior but specifically aimed at helping veterans set a “first step” goal by choosing a program to enroll in that aligned with their values and preferences as well as risk factors highlighted by their HRA surveys.

The results aren’t in, but the researchers expect their findings to help the VHA implement its plan to engage veterans in preventive health care. Their “robustly designed trial,” they say, “will add valuable knowledge at a critical time when VHA and other health systems are working to understand how to effectively incorporate HRA findings into the busy clinic flow of primary care.”

The VHA offers several preventive care programs to veterans who are at high risk for various chronic illnesses: For instance, 20% of veterans smoke, and > 70% of VHA patients are overweight.

Although those programs are well supported and have strong evidence for effectiveness, they’re underused, say researchers from Durham VAMC and Duke University in North Carolina, VA Ann Arbor Healthcare System in Michigan, and VA Salt Lake City Center for Informatics Decision Enhancement and Surveillance and University of Utah. The VHA’s MOVE! Program produced significant weight loss among participants—the only problem was that < 10% of eligible veterans actually joined.

The researchers conducted the ACTIVATE trial, which involved a web-based health risk assessment (HRA) coupled with a health coaching intervention to link veterans to a local prevention program. In the study, veterans completed an online HRA. The researchers then tested whether 2 telephone-based coaching sessions were more effective in getting the veterans to enroll in prevention programs than did completing the HRA.

The coaching was not designed to change behavior but specifically aimed at helping veterans set a “first step” goal by choosing a program to enroll in that aligned with their values and preferences as well as risk factors highlighted by their HRA surveys.

The results aren’t in, but the researchers expect their findings to help the VHA implement its plan to engage veterans in preventive health care. Their “robustly designed trial,” they say, “will add valuable knowledge at a critical time when VHA and other health systems are working to understand how to effectively incorporate HRA findings into the busy clinic flow of primary care.”

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Psychosis in BPD

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Health law changes under new administration

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