Azadeh Nezhat, MD

Minimally invasive surgical techniques, which have revolutionized modern-day surgery, are the current standard of care for benign hysterectomies.^1-4 Many surgeons use a video-laparoscopic approach, with or without robotic assistance, to perform a hysterectomy. The development of a bladder flap or vesicovaginal surgical space is a critical step for mobilizing the bladder. When properly performed, it allows for appropriate closure of the vaginal cuff while mitigating the risk of urinary bladder damage.

In patients with no prior pelvic surgeries, this vesicovaginal anatomic space is typically developed with ease. However, in patients who have had prior cesarean deliveries (CDs), the presence of vesicouterine adhesions could make this step significantly more challenging. As a result, the risk of bladder injury is higher.^5-8

With the current tide of cesarean birth rates approaching 33% on a national scale, the presence of vesicouterine adhesions is commonly encountered.⁹ These adhesions can distort the anatomy and thereby create more difficult dissections and increase operative time, conversion to laparotomy, and inadvertent cystotomy. Such a challenge also presents an increased risk of injuring adjacent structures.

In this article, we describe an effective method of dissection that is especially useful in the setting of prior CDs. This method involves developing a "new" surgical space lateral and caudal to the vesicocervical space. 

Steps in operative planning

Preoperative evaluation. A thorough preoperative evaluation should be performed for patients planning to undergo a laparoscopic hysterectomy. This includes obtaining details of their medical and surgical history. Access to prior surgical records may help to facilitate planning of the surgical approach. Previous pelvic surgery, such as CD, anterior myomectomy, cesarean scar defect repair, endometriosis treatment, or exploratory laparotomy, may predispose these patients to develop adhesions in the anterior cul-de-sac. Our method of reverse vesicouterine fold dissection can be particularly efficacious in these settings.

Surgical preparation and laparoscopic port placement. In the operative suite, the patient is placed under general anesthesia and positioned in the dorsal lithotomy position.¹⁰ Sterile prep and drapes are used in the standard fashion. A urinary catheter is inserted to maintain a decompressed bladder. A uterine manipulator is inserted with good placement ensured.

Per our practice, we introduce laparoscopic ports in 4 locations. The first incision is made in the umbilicus for the introduction of a 10-mm laparoscope. Three subsequent 5-mm incisions are made in the left and right lower lateral quadrants and medially at the level of the suprapubic region.¹⁰ Upon laparoscopic entry, we perform a comprehensive survey of the abdominopelvic cavity. Adequate mobility of the uterus is confirmed.¹¹ Any posterior uterine adhesions or endometriosis are treated appropriately.¹²

First step in the surgical technique: Lateral dissection

We proceed by first desiccating and cutting the round ligament laterally near the inguinal canal. This technique is carried forward in a caudal direction as the areolar tissue near the obliterated umbilical artery is expanded by the pneumoperitoneum. With a vessel sealing-cutting device, we address the attachments to the adnexa. If the ovaries are to be retained, the utero-ovarian ligament is dessicated and cut. If an oophorectomy is indicated, the infundibulopelvic ligament is dessicated and cut.

Continue to: Using the tip of the vessel sealing...

Using the tip of the vessel sealing-cutting device, the space between the anterior and posterior leaves of the broad ligament is developed and opened. A grasping forceps is then used to elevate the anterior leaf of the broad ligament and maintain medial traction. A space parallel and lateral to the cervix and bladder is then created with blunt dissection.

The inferior and medial direction of this dissection is paramount to avoid injury to nearby structures in the pelvic sidewall. Gradually, this will lead to the identification of the vesciovaginal ligament and then the vesicocervical ligament. The development of these spaces allows for the lateral and inferior displacement of the ureter. These maneuvers can mitigate ureter injury by pushing it away from the planes of dissection during the hysterectomy.

Continued traction is maintained by keeping the medial aspect of the anterior leaf of the broad ligament intact. However, the posterior leaf is dissected next, which further lateralizes the ureter. Now, with the uterine vessels fully exposed, they are thoroughly dessicated and ligated. The same procedure is then performed on the contralateral side.¹¹ (See the box below for links to videos that demonstrate the techniques described here.)

Creating the “new” space

In the “new” space that was partially developed during the lateral dissection, blunt dissection is continued, using a sweeping motion from an inferior-to-superior direction, to extend this avascular space. This is performed bilaterally until both sides are connected from the inferior aspect of the vesicouterine adhesions, if present. This thorough dissection creates what we refer to as a “new” space¹¹ (FIGURE 1).

Medially, the new space is bordered by the vesicocervical-vaginal ligament, also known as the bladder pillar. Its distal landmark is the bladder. The remaining intact anterior leaf of the broad ligament lies adjacent to the space anteriorly. The inner aspect of the obliterated umbilical artery neighbors it laterally. Lastly, the vesicovaginal plane’s posterior margin is the parametrium, which is the region where the ureter courses into the bladder. The paravesical space lies lateral to the obliterated umbilical ligament.

Visualization of this new space is made possible in the laparoscopic setting. The pneumoperitoneum allows for better demarcation of the space. Additionally, laparoscopic views of the anatomic spaces differ from those of the laparotomy view because of the magnification and the insufflation of carbon dioxide gas in the spaces.^13,14 In our experience, approaching the surgery from the “new” space could significantly decrease the risk of genitourinary injuries in patients with anterior cul-de-sac adhesions (FIGURE 2).

Using the reverse vesicouterine fold dissection technique

Among patients with prior CDs, adhesions often are at the level of or superior to the prior CD scar. By creating the new space, safe dissection from a previously untouched area can be accomplished and injury to the urinary bladder can be avoided.

The reverse vesicouterine fold dissection can be performed from this space. Using the previously described blunt sweeping motion from an inferior-to-superior direction, the vesicovaginal and vesicocervical space is further developed from an unscarred plane. This will separate the lowest portion of the bladder from the vagina, cervix, and uterus in a safe manner. Similar to the technique performed during a vaginal hysterectomy, this reverse motion of developing the bladder flap avoids erroneous and blind dissection through the vesicouterine adhesions (FIGURES 3–5).

Continue to: Completing the surgery...

Completing the surgery

Once the bladder is freely mobilized and all adhesions have been dissected, the cervix is circumferentially amputated using monopolar cautery. The vaginal cuff can then be closed from either a laparoscopic or vaginal approach using polyglactin 910 (0-Vicryl) or barbed (V-Loc) suture in a running or interrupted fashion. Our practice uses a 1.5-cm margin depth with each suture. At the end of the surgery, routine cystoscopy is performed to verify distal ureteral patency.¹⁶ Postoperatively, we manage these patients using a fast-track, or enhanced recovery, model.¹⁷

An effective technique in challenging situations

Genitourinary injury is a common complication of hysterectomy.¹⁸ The proximity of the bladder and ureters to the field of dissection during a hysterectomy can be especially challenging when the anatomy is distorted by adhesion formation from prior surgeries. One study demonstrated a 1.3% incidence of urinary tract injuries during laparoscopic hysterectomy.⁶ This included 0.54% ureteral injuries, 0.71% urinary bladder injuries, and 0.06% combined bladder and ureteral injuries.⁶ Particularly among patients with a prior CD, the risk of bladder injury can be significantly heightened.¹⁸

The reverse vesicouterine fold dissection technique that we described offers multiple benefits. By starting the procedure from an untouched and avascular plane, dissection into the plane of the prior adhesions can be circumvented; thus, bleeding is limited and injury to the bladder and ureters is avoided or minimized. By using blunt and sharp dissection, thermal injury and delayed necrosis can be mitigated. Finally, with bladder mobilization well below the colpotomy site, more adequate vaginal tissue is free to be incorporated into the vaginal cuff closure, thereby limiting the risk of cuff dehiscence.¹⁶

While we have found this technique effective for patients with prior cesarean deliveries, it also may be applied to any patient who has a scarred anterior cul-de-sac. This could include patients with prior myomectomy, cesarean scar defect, or endometriosis. Despite the technique being a safeguard against bladder injury, surgeons must still use care in developing the spaces to avoid ureteral injury, especially in a setting of distorted anatomy.

Minimally invasive surgical techniques, which have revolutionized modern-day surgery, are the current standard of care for benign hysterectomies.^1-4 Many surgeons use a video-laparoscopic approach, with or without robotic assistance, to perform a hysterectomy. The development of a bladder flap or vesicovaginal surgical space is a critical step for mobilizing the bladder. When properly performed, it allows for appropriate closure of the vaginal cuff while mitigating the risk of urinary bladder damage.

In patients with no prior pelvic surgeries, this vesicovaginal anatomic space is typically developed with ease. However, in patients who have had prior cesarean deliveries (CDs), the presence of vesicouterine adhesions could make this step significantly more challenging. As a result, the risk of bladder injury is higher.^5-8

With the current tide of cesarean birth rates approaching 33% on a national scale, the presence of vesicouterine adhesions is commonly encountered.⁹ These adhesions can distort the anatomy and thereby create more difficult dissections and increase operative time, conversion to laparotomy, and inadvertent cystotomy. Such a challenge also presents an increased risk of injuring adjacent structures.

In this article, we describe an effective method of dissection that is especially useful in the setting of prior CDs. This method involves developing a "new" surgical space lateral and caudal to the vesicocervical space. 

Steps in operative planning

Preoperative evaluation. A thorough preoperative evaluation should be performed for patients planning to undergo a laparoscopic hysterectomy. This includes obtaining details of their medical and surgical history. Access to prior surgical records may help to facilitate planning of the surgical approach. Previous pelvic surgery, such as CD, anterior myomectomy, cesarean scar defect repair, endometriosis treatment, or exploratory laparotomy, may predispose these patients to develop adhesions in the anterior cul-de-sac. Our method of reverse vesicouterine fold dissection can be particularly efficacious in these settings.

Surgical preparation and laparoscopic port placement. In the operative suite, the patient is placed under general anesthesia and positioned in the dorsal lithotomy position.¹⁰ Sterile prep and drapes are used in the standard fashion. A urinary catheter is inserted to maintain a decompressed bladder. A uterine manipulator is inserted with good placement ensured.

Per our practice, we introduce laparoscopic ports in 4 locations. The first incision is made in the umbilicus for the introduction of a 10-mm laparoscope. Three subsequent 5-mm incisions are made in the left and right lower lateral quadrants and medially at the level of the suprapubic region.¹⁰ Upon laparoscopic entry, we perform a comprehensive survey of the abdominopelvic cavity. Adequate mobility of the uterus is confirmed.¹¹ Any posterior uterine adhesions or endometriosis are treated appropriately.¹²

First step in the surgical technique: Lateral dissection

We proceed by first desiccating and cutting the round ligament laterally near the inguinal canal. This technique is carried forward in a caudal direction as the areolar tissue near the obliterated umbilical artery is expanded by the pneumoperitoneum. With a vessel sealing-cutting device, we address the attachments to the adnexa. If the ovaries are to be retained, the utero-ovarian ligament is dessicated and cut. If an oophorectomy is indicated, the infundibulopelvic ligament is dessicated and cut.

Continue to: Using the tip of the vessel sealing...

Using the tip of the vessel sealing-cutting device, the space between the anterior and posterior leaves of the broad ligament is developed and opened. A grasping forceps is then used to elevate the anterior leaf of the broad ligament and maintain medial traction. A space parallel and lateral to the cervix and bladder is then created with blunt dissection.

The inferior and medial direction of this dissection is paramount to avoid injury to nearby structures in the pelvic sidewall. Gradually, this will lead to the identification of the vesciovaginal ligament and then the vesicocervical ligament. The development of these spaces allows for the lateral and inferior displacement of the ureter. These maneuvers can mitigate ureter injury by pushing it away from the planes of dissection during the hysterectomy.

Continued traction is maintained by keeping the medial aspect of the anterior leaf of the broad ligament intact. However, the posterior leaf is dissected next, which further lateralizes the ureter. Now, with the uterine vessels fully exposed, they are thoroughly dessicated and ligated. The same procedure is then performed on the contralateral side.¹¹ (See the box below for links to videos that demonstrate the techniques described here.)

Creating the “new” space

In the “new” space that was partially developed during the lateral dissection, blunt dissection is continued, using a sweeping motion from an inferior-to-superior direction, to extend this avascular space. This is performed bilaterally until both sides are connected from the inferior aspect of the vesicouterine adhesions, if present. This thorough dissection creates what we refer to as a “new” space¹¹ (FIGURE 1).

Medially, the new space is bordered by the vesicocervical-vaginal ligament, also known as the bladder pillar. Its distal landmark is the bladder. The remaining intact anterior leaf of the broad ligament lies adjacent to the space anteriorly. The inner aspect of the obliterated umbilical artery neighbors it laterally. Lastly, the vesicovaginal plane’s posterior margin is the parametrium, which is the region where the ureter courses into the bladder. The paravesical space lies lateral to the obliterated umbilical ligament.

Visualization of this new space is made possible in the laparoscopic setting. The pneumoperitoneum allows for better demarcation of the space. Additionally, laparoscopic views of the anatomic spaces differ from those of the laparotomy view because of the magnification and the insufflation of carbon dioxide gas in the spaces.^13,14 In our experience, approaching the surgery from the “new” space could significantly decrease the risk of genitourinary injuries in patients with anterior cul-de-sac adhesions (FIGURE 2).

Using the reverse vesicouterine fold dissection technique

Among patients with prior CDs, adhesions often are at the level of or superior to the prior CD scar. By creating the new space, safe dissection from a previously untouched area can be accomplished and injury to the urinary bladder can be avoided.

The reverse vesicouterine fold dissection can be performed from this space. Using the previously described blunt sweeping motion from an inferior-to-superior direction, the vesicovaginal and vesicocervical space is further developed from an unscarred plane. This will separate the lowest portion of the bladder from the vagina, cervix, and uterus in a safe manner. Similar to the technique performed during a vaginal hysterectomy, this reverse motion of developing the bladder flap avoids erroneous and blind dissection through the vesicouterine adhesions (FIGURES 3–5).

Continue to: Completing the surgery...

Completing the surgery

Once the bladder is freely mobilized and all adhesions have been dissected, the cervix is circumferentially amputated using monopolar cautery. The vaginal cuff can then be closed from either a laparoscopic or vaginal approach using polyglactin 910 (0-Vicryl) or barbed (V-Loc) suture in a running or interrupted fashion. Our practice uses a 1.5-cm margin depth with each suture. At the end of the surgery, routine cystoscopy is performed to verify distal ureteral patency.¹⁶ Postoperatively, we manage these patients using a fast-track, or enhanced recovery, model.¹⁷

An effective technique in challenging situations

Genitourinary injury is a common complication of hysterectomy.¹⁸ The proximity of the bladder and ureters to the field of dissection during a hysterectomy can be especially challenging when the anatomy is distorted by adhesion formation from prior surgeries. One study demonstrated a 1.3% incidence of urinary tract injuries during laparoscopic hysterectomy.⁶ This included 0.54% ureteral injuries, 0.71% urinary bladder injuries, and 0.06% combined bladder and ureteral injuries.⁶ Particularly among patients with a prior CD, the risk of bladder injury can be significantly heightened.¹⁸

The reverse vesicouterine fold dissection technique that we described offers multiple benefits. By starting the procedure from an untouched and avascular plane, dissection into the plane of the prior adhesions can be circumvented; thus, bleeding is limited and injury to the bladder and ureters is avoided or minimized. By using blunt and sharp dissection, thermal injury and delayed necrosis can be mitigated. Finally, with bladder mobilization well below the colpotomy site, more adequate vaginal tissue is free to be incorporated into the vaginal cuff closure, thereby limiting the risk of cuff dehiscence.¹⁶

While we have found this technique effective for patients with prior cesarean deliveries, it also may be applied to any patient who has a scarred anterior cul-de-sac. This could include patients with prior myomectomy, cesarean scar defect, or endometriosis. Despite the technique being a safeguard against bladder injury, surgeons must still use care in developing the spaces to avoid ureteral injury, especially in a setting of distorted anatomy.

Minimally invasive surgical techniques, which have revolutionized modern-day surgery, are the current standard of care for benign hysterectomies.^1-4 Many surgeons use a video-laparoscopic approach, with or without robotic assistance, to perform a hysterectomy. The development of a bladder flap or vesicovaginal surgical space is a critical step for mobilizing the bladder. When properly performed, it allows for appropriate closure of the vaginal cuff while mitigating the risk of urinary bladder damage.

In patients with no prior pelvic surgeries, this vesicovaginal anatomic space is typically developed with ease. However, in patients who have had prior cesarean deliveries (CDs), the presence of vesicouterine adhesions could make this step significantly more challenging. As a result, the risk of bladder injury is higher.^5-8

With the current tide of cesarean birth rates approaching 33% on a national scale, the presence of vesicouterine adhesions is commonly encountered.⁹ These adhesions can distort the anatomy and thereby create more difficult dissections and increase operative time, conversion to laparotomy, and inadvertent cystotomy. Such a challenge also presents an increased risk of injuring adjacent structures.

In this article, we describe an effective method of dissection that is especially useful in the setting of prior CDs. This method involves developing a "new" surgical space lateral and caudal to the vesicocervical space. 

Steps in operative planning

Preoperative evaluation. A thorough preoperative evaluation should be performed for patients planning to undergo a laparoscopic hysterectomy. This includes obtaining details of their medical and surgical history. Access to prior surgical records may help to facilitate planning of the surgical approach. Previous pelvic surgery, such as CD, anterior myomectomy, cesarean scar defect repair, endometriosis treatment, or exploratory laparotomy, may predispose these patients to develop adhesions in the anterior cul-de-sac. Our method of reverse vesicouterine fold dissection can be particularly efficacious in these settings.

Surgical preparation and laparoscopic port placement. In the operative suite, the patient is placed under general anesthesia and positioned in the dorsal lithotomy position.¹⁰ Sterile prep and drapes are used in the standard fashion. A urinary catheter is inserted to maintain a decompressed bladder. A uterine manipulator is inserted with good placement ensured.

Per our practice, we introduce laparoscopic ports in 4 locations. The first incision is made in the umbilicus for the introduction of a 10-mm laparoscope. Three subsequent 5-mm incisions are made in the left and right lower lateral quadrants and medially at the level of the suprapubic region.¹⁰ Upon laparoscopic entry, we perform a comprehensive survey of the abdominopelvic cavity. Adequate mobility of the uterus is confirmed.¹¹ Any posterior uterine adhesions or endometriosis are treated appropriately.¹²

First step in the surgical technique: Lateral dissection

We proceed by first desiccating and cutting the round ligament laterally near the inguinal canal. This technique is carried forward in a caudal direction as the areolar tissue near the obliterated umbilical artery is expanded by the pneumoperitoneum. With a vessel sealing-cutting device, we address the attachments to the adnexa. If the ovaries are to be retained, the utero-ovarian ligament is dessicated and cut. If an oophorectomy is indicated, the infundibulopelvic ligament is dessicated and cut.

Continue to: Using the tip of the vessel sealing...

Using the tip of the vessel sealing-cutting device, the space between the anterior and posterior leaves of the broad ligament is developed and opened. A grasping forceps is then used to elevate the anterior leaf of the broad ligament and maintain medial traction. A space parallel and lateral to the cervix and bladder is then created with blunt dissection.

The inferior and medial direction of this dissection is paramount to avoid injury to nearby structures in the pelvic sidewall. Gradually, this will lead to the identification of the vesciovaginal ligament and then the vesicocervical ligament. The development of these spaces allows for the lateral and inferior displacement of the ureter. These maneuvers can mitigate ureter injury by pushing it away from the planes of dissection during the hysterectomy.

Continued traction is maintained by keeping the medial aspect of the anterior leaf of the broad ligament intact. However, the posterior leaf is dissected next, which further lateralizes the ureter. Now, with the uterine vessels fully exposed, they are thoroughly dessicated and ligated. The same procedure is then performed on the contralateral side.¹¹ (See the box below for links to videos that demonstrate the techniques described here.)

Creating the “new” space

In the “new” space that was partially developed during the lateral dissection, blunt dissection is continued, using a sweeping motion from an inferior-to-superior direction, to extend this avascular space. This is performed bilaterally until both sides are connected from the inferior aspect of the vesicouterine adhesions, if present. This thorough dissection creates what we refer to as a “new” space¹¹ (FIGURE 1).

Medially, the new space is bordered by the vesicocervical-vaginal ligament, also known as the bladder pillar. Its distal landmark is the bladder. The remaining intact anterior leaf of the broad ligament lies adjacent to the space anteriorly. The inner aspect of the obliterated umbilical artery neighbors it laterally. Lastly, the vesicovaginal plane’s posterior margin is the parametrium, which is the region where the ureter courses into the bladder. The paravesical space lies lateral to the obliterated umbilical ligament.

Visualization of this new space is made possible in the laparoscopic setting. The pneumoperitoneum allows for better demarcation of the space. Additionally, laparoscopic views of the anatomic spaces differ from those of the laparotomy view because of the magnification and the insufflation of carbon dioxide gas in the spaces.^13,14 In our experience, approaching the surgery from the “new” space could significantly decrease the risk of genitourinary injuries in patients with anterior cul-de-sac adhesions (FIGURE 2).

Using the reverse vesicouterine fold dissection technique

Among patients with prior CDs, adhesions often are at the level of or superior to the prior CD scar. By creating the new space, safe dissection from a previously untouched area can be accomplished and injury to the urinary bladder can be avoided.

The reverse vesicouterine fold dissection can be performed from this space. Using the previously described blunt sweeping motion from an inferior-to-superior direction, the vesicovaginal and vesicocervical space is further developed from an unscarred plane. This will separate the lowest portion of the bladder from the vagina, cervix, and uterus in a safe manner. Similar to the technique performed during a vaginal hysterectomy, this reverse motion of developing the bladder flap avoids erroneous and blind dissection through the vesicouterine adhesions (FIGURES 3–5).

Continue to: Completing the surgery...

Completing the surgery

Once the bladder is freely mobilized and all adhesions have been dissected, the cervix is circumferentially amputated using monopolar cautery. The vaginal cuff can then be closed from either a laparoscopic or vaginal approach using polyglactin 910 (0-Vicryl) or barbed (V-Loc) suture in a running or interrupted fashion. Our practice uses a 1.5-cm margin depth with each suture. At the end of the surgery, routine cystoscopy is performed to verify distal ureteral patency.¹⁶ Postoperatively, we manage these patients using a fast-track, or enhanced recovery, model.¹⁷

An effective technique in challenging situations

Genitourinary injury is a common complication of hysterectomy.¹⁸ The proximity of the bladder and ureters to the field of dissection during a hysterectomy can be especially challenging when the anatomy is distorted by adhesion formation from prior surgeries. One study demonstrated a 1.3% incidence of urinary tract injuries during laparoscopic hysterectomy.⁶ This included 0.54% ureteral injuries, 0.71% urinary bladder injuries, and 0.06% combined bladder and ureteral injuries.⁶ Particularly among patients with a prior CD, the risk of bladder injury can be significantly heightened.¹⁸

The reverse vesicouterine fold dissection technique that we described offers multiple benefits. By starting the procedure from an untouched and avascular plane, dissection into the plane of the prior adhesions can be circumvented; thus, bleeding is limited and injury to the bladder and ureters is avoided or minimized. By using blunt and sharp dissection, thermal injury and delayed necrosis can be mitigated. Finally, with bladder mobilization well below the colpotomy site, more adequate vaginal tissue is free to be incorporated into the vaginal cuff closure, thereby limiting the risk of cuff dehiscence.¹⁶

While we have found this technique effective for patients with prior cesarean deliveries, it also may be applied to any patient who has a scarred anterior cul-de-sac. This could include patients with prior myomectomy, cesarean scar defect, or endometriosis. Despite the technique being a safeguard against bladder injury, surgeons must still use care in developing the spaces to avoid ureteral injury, especially in a setting of distorted anatomy.

CASE
A 28-year-old patient presents for evaluation and management of her chronic pelvic pain, dysmenorrhea, and menorrhagia. She previously tried ibuprofen with no pain relief. She also tried oral and long-acting reversible contraceptives but continued to be symptomatic. She underwent pelvic sonography, which demonstrated a large globular uterus with myometrial thickening and myometrial cysts with increased hypervascularity. Subsequent magnetic resonance imaging indicated a thickened junctional zone. Feeling she had exhausted medical manegement options with no significant improvement, she desired surgical treatment, but wanted to retain her future fertility. As a newlywed, she and her husband were planning on building a family so she desired to retain her uterus for potential future pregnancy.

How would you address this patient’s disruptive symptoms, while affirming her long-term plans by choosing the proper intervention?

Adenomyosis is characterized by endometrial-like glands and stroma deep within the myometrium of the uterus and generally is classified as diffuse or focal. This common, benign gynecologic condition is known to cause enlargement of the uterus secondary to stimulation of ectopic endometrial-like cells.^1-3 Although the true incidence of adenomyosis is unknown because of the difficulty of making the diagnosis, prevalence has been variously reported at 6% to 70% among reproductive-aged women.^4,5

In this review, we first examine the clinical presentation and diagnosis of adenomyosis. We then discuss clinical indications for, and surgical techniques of, adenomyomectomy, including our preferred uterine-sparing approach for focal disease or when the patient wants to preserve fertility: video laparoscopic resection with or without robotic assistance, aided by minilaparotomy when indicated.

Treatment evolved in a century and a half

Adenomyosis was first described more than 150 years ago; historically, hysterectomy was the mainstay of treatment.^2,6 Conservative surgical treatment for adenomyosis has been reported since the early 1950s.^6-8 Surgical treatment initially became more widespread following the introduction of wedge resection, which allowed for partial excision of adenomyotic nodules.⁹

More recent developments in diagnostic technologies and capabilities have allowed for the emergence of additional uterine-sparing and minimally invasive surgical treatment options for adenomyosis.^3,10 Although the use of laparoscopic approaches is limited because a high level of technical skill is required to undertake these procedures, such approaches are becoming increasingly important as more and more patients seek fertility conservation.^11-13

How does adenomyosis present?

Adenomyosis symptoms commonly consist of abnormal uterine bleeding and dysmenorrhea, affecting approximately 40% to 60% and 15% to 30% of patients with the condition, respectively.¹⁴ These symptoms are considered nonspecific because they are also associated with other uterine abnormalities.¹⁵ Although menorrhagia is not associated with extent of disease, dysmenorrhea is associated with both the number and depth of adenomyotic foci.¹⁴

Other symptoms reported with adenomyosis include chronic pelvic pain, dyspareunia, as well as infertility. Note, however, that a large percentage of patients are asymptomatic.^16,17

On physical examination, patients commonly exhibit a diffusely enlarged, globular uterus. This finding is secondary to uniform hyperplasia and hypertrophy of the myometrium, caused by stimulation of ectopic endometrial cells.² A subset of patients experience significant uterine tenderness.¹⁸ Other common findings associated with adenomyosis include uterine abnormalities, such as leiomyomata, endometriosis, and endometrial polyps.

Continue to: Two-pronged route to diagnosis and a differential...

Two-pronged route to diagnosis and a differential

Histology

Adenomyosis is definitively diagnosed based on histologic findings of endometrial-like tissue within the myometrium. Historically, histologic analysis was performed on specimens following hysterectomy but, more recently, has utilized specimens obtained from hysteroscopic and laparoscopic myometrial biopsies.¹⁹ Importantly, although hysteroscopic and laparoscopic biopsies are taken under direct visualization, there are no pathognomonic signs for adenomyosis; a diagnosis can therefore be missed if adenomyosis is not present at biopsied sites.¹ The sensitivity of random biopsy at laparoscopy has been found to be as low as 2% to as high as 56%.²⁰

Imaging

Imaging can be helpful in clinical decision making and to guide the differential diagnosis. Transvaginal ultrasonography (TVUS) is often the first mode of imaging used for the investigation of abnormal uterine bleeding or pelvic pain. Diagnosis by TVUS is difficult because the modality is operator dependent and standard diagnostic criteria are lacking.⁵

The most commonly reported ultrasonographic features of adenomyosis are^21,22:

• a globally enlarged uterus
• asymmetry
• myometrial thickening with heterogeneity
• poorly defined foci of hyperechoic regions, surrounded by hypoechoic areas that correspond to smooth-muscle hyperplasia
• myometrial cysts.

Doppler ultrasound examination in patients with adenomyosis reveals increased flow to the myometrium without evidence of large blood vessels.

3-dimensional (3-D) ultrasonography. Integration of 3-D ultrasonography has allowed for identification of the thicker junctional zone that suggests adenomyosis. In a systematic review of the accuracy of TVUS, investigators reported a pooled sensitivity and specificity for 2-dimensional ultrasonography of 83.8% and 63.9%, respectively, and a pooled sensitivity and specificity for 3-dimensional ultrasonography of 88.9% and 56.0%, respectively.²²

Magnetic resonance imaging (MRI) is also used in the evaluation of adenomyosis. Although MRI is considered a more accurate diagnostic modality because it is not operator dependent, expense often prohibits its use in the work-up of abnormal uterine bleeding and chronic pelvic pain.^2,23

The most commonly reported MRI findings in adenomyosis include a globular or asymmetric uterus, heterogeneity of myometrial signal intensity, and thickening of the junctional zone²⁴ (FIGURE 1). In a systematic review, researchers reported a pooled sensitivity and specificity of 77% and 89%, respectively, for the diagnosis of adenomyosis using MRI.²⁵

Approaches to treatment

Medical management

No medical therapies or guidelines specific to the treatment of adenomyosis exist.⁹ Often, nonsteroidal anti-inflammatory drugs (NSAIDs) are employed to combat cramping and pain associated with increased prostaglandin levels.²⁶ A systematic review found that NSAIDs are significantly better at treating dysmenorrhea than placebo alone.²⁶

Moreover, adenomyosis is an estrogen-dependent disease; consequently, many medical treatments are targeted at suppressing the hypothalamic–pituitary–ovarian axis and inducing endometrial atrophy. Medications commonly used (off-label) for this effect include combined or progestin-only oral contraceptive pills, gonadotropin-releasing hormone (GnRH) agonists, levonorgestrel-releasing intrauterine devices, danazol, and aromatase inhibitors.

Use of a GnRH agonist, such as leuprolide, is limited to a short course (<6 months) because menopausal-like symptoms, such as hot flashes, vaginal atrophy, and loss of bone-mineral density, can develop.¹⁶ Symptoms of adenomyosis often return upon cessation of hormonal treatment.¹

Novel therapies are under investigation, including GnRH antagonists, selective progesterone-receptor modulators, and antiplatelet therapy.²⁷

Although there are few data showing the effectiveness of medical therapy on adenomyosis-specific outcomes, medications are particularly useful in patients who are poor surgical candidates or who may prefer not to undergo surgery. Furthermore, medical therapy has considerable use in conjunction with surgical intervention; a prospective observational study showed that women who underwent GnRH agonist treatment following surgery had significantly greater improvement of their dysmenorrhea and menorrhagia, compared with those who underwent surgery only.²⁸ In addition, preoperative administration of a GnRH agonist or danazol several months prior to surgery has been shown to reduce uterine vascularity and, thus, blood loss at surgery.^29,30

Continue to: Surgery

Surgery

The objective of surgical management is to ameliorate symptoms in a conservative manner, by excision or cytoreduction of adenomyotic lesions, while preserving, even improving, fertility.^3,11,31 The choice of procedure depends, ultimately, on the location and extent of disease, the patient’s desire for uterine preservation and fertility, and surgical skill.³

Historically, hysterectomy was used to treat adenomyosis; for patients declining fertility preservation, hysterectomy remains the definitive treatment. Since the early 1950s, several techniques for laparotomic reduction have been developed. Surgeries that achieve partial reduction include:

Wedge resection of the uterine wall entails removal of the seromuscular layer at the identified location of adenomyotic tissue, with subsequent repair of the remaining muscular and serosal layers surrounding the wound.^3,32 Because adenomyotic tissue can remain on either side of the incision in wedge resection, clinical improvement in symptoms of dysmenorrhea and menorrhagia are modest, and recurrence is possible.⁷

Modified reduction surgery. Modifications of reduction surgery include slicing adenomyotic tissue using microsurgery and partial excision.³³

Transverse-H incision of the uterine wall involves a transverse incision on the uterine fundus, separating serosa and myometrium, followed by removal of diseased tissue using an electrosurgical scalpel or scissors. Tensionless suturing is used to close the myometrial layers in 1 or 2 layers to establish hemostasis and close the defect; serosal flaps are closed with subserosal interrupted sutures.³⁴ Data show that, following surgery with this technique, 21.4% to 38.7% of patients who attempt conception achieve clinical pregnancy.⁷

Complete, conservative resection in cases of diffuse and focal adenomyosis is possible using the triple-flap method, in which total resection is achieved by removing diseased myometrium until healthy, soft tissue—with normal texture, color, and vascularity—is reached.² Repair with this technique reduces the risk of uterine rupture by reconstructing the uterine wall using a muscle flap prepared by metroplasty.⁷ In a study of 64 women who underwent triple-flap resection, a clinical pregnancy rate of 74% and a live birth rate of 52% were reported.⁷

Minimally invasive approaches. Although several techniques have been developed for focal excision of adenomyosis by laparotomy,⁷ the trend has been toward minimally invasive surgery, which reduces estimated blood loss, decreases length of stay, and reduces adhesion formation—all without a statistically significant difference in long-term clinical outcomes, compared to other techniques.^35-39 Furthermore, enhanced visualization of pelvic organs provided by laparoscopy is vital in the case of adenomyosis.^3,31

How our group approaches surgical management. A challenge in laparoscopic surgery of adenomyosis is extraction of an extensive amount of diseased tissue. In 1994, our group described the use of simultaneous operative laparoscopy and minilaparotomy technique as an effective and safe alternative to laparotomy in the treatment of myomectomy⁶; the surgical principles of that approach are applied to adenomyomectomy. The technique involves treatment of pelvic pathology with laparoscopy, removal of tissue through the minilaparotomy incision, and repair of the uterine wall defect in layers.

References

1. Struble J, Reid S, Bedaiwy MA. Adenomyosis: a clinical review of a challenging gynecologic condition. J Minim Invasive Gynecol.2016; 23:164-185.
2. García-Solares J, Donnez J, Donnez O, et al. Pathogenesis of uterine adenomyosis: invagination or metaplasia? Fertil Steril.2018;109:371-379.
3. Ferenczy A. Pathophysiology of adenomyosis. Hum Reprod Update. 1998;4:312-322.
4. Gargett CE. Uterine stem cells: what is the evidence? Hum Reprod Update. 2007;13:87-101.
5. Chan RW, Schwab KE, Gargett CE. Clonogenicity of human endometrial epithelial and stromal cells. Biol Reprod. 2004;70:1738-1750.
6. Schwab KE, Chan RWS, Gargett CE. Putative stem cell activity of human endometrial epithelial and stromal cells during the menstrual cycle. Fertil Steril. 2005;84(Suppl 2):1124-1130.
7. Sasson IE, Taylor HS. Stem cells and the pathogenesis of endometriosis. Ann N Y Acad Sci. 2008;1127:106-115.
8. Du H, Taylor HS. Stem cells and female reproduction. Reprod Sci. 2009;16:126-139.
9. Acloque H, Adams MS, Fishwick K, et al. Epithelial-mesenchymal transitions: the importance of changing cell state in development and disease. J Clin Invest. 2009;119:1438-1449.

Continue to: In 57 women who underwent…

In 57 women who underwent this procedure, the mean operative time was 127 minutes; average estimated blood loss was 267 mL.⁴⁰ Overall, laparoscopy with minilaparotomy was found to be a less technically difficult technique for laparoscopic myomectomy; allowed better closure of the uterine defect; and might have required less time to perform.³

We therefore advocate video laparoscopic wedge resection with or without robotic assistance, aided by minilaparotomy when necessary for safe removal of larger adenomyomas, as the preferred uterine-sparing surgical approach for focal adenomyosis or when the patient wants to preserve fertility (FIGURE 2). We think that this technique allows focal adenomyosis to be treated by wedge resection of the diseased myometrium, with subsequent closure of the remaining myometrial defect using a barbed V-Loc (Medtronic, Minneapolis, Minnesota) delayed absorbable suture in layers (FIGURE 3). Minilaparotomy can be utilized when indicated to aid removal of the resected myometrial specimen.

In our extensive experience, we have found that this technique provides significant relief of symptoms and improvements in fertility outcomes while minimizing surgical morbidity.

CASE Resolved

The patient underwent successful wedge resection of her adenomyosis by laparoscopy. She experienced nearly complete resolution of her symptoms of dysmenorrhea, menorrhagia, and pelvic pain. She retained good uterine integrity. Three years later, she and her husband became parents when she delivered their first child by cesarean delivery at full term. After she completed childbearing, she ultimately opted for minimally invasive hysterectomy.

The authors would like to acknowledge Mailinh Vu, MD, Fellow at Camran Nezhat Institute, for reviewing and editing this article.

CASE
A 28-year-old patient presents for evaluation and management of her chronic pelvic pain, dysmenorrhea, and menorrhagia. She previously tried ibuprofen with no pain relief. She also tried oral and long-acting reversible contraceptives but continued to be symptomatic. She underwent pelvic sonography, which demonstrated a large globular uterus with myometrial thickening and myometrial cysts with increased hypervascularity. Subsequent magnetic resonance imaging indicated a thickened junctional zone. Feeling she had exhausted medical manegement options with no significant improvement, she desired surgical treatment, but wanted to retain her future fertility. As a newlywed, she and her husband were planning on building a family so she desired to retain her uterus for potential future pregnancy.

How would you address this patient’s disruptive symptoms, while affirming her long-term plans by choosing the proper intervention?

Adenomyosis is characterized by endometrial-like glands and stroma deep within the myometrium of the uterus and generally is classified as diffuse or focal. This common, benign gynecologic condition is known to cause enlargement of the uterus secondary to stimulation of ectopic endometrial-like cells.^1-3 Although the true incidence of adenomyosis is unknown because of the difficulty of making the diagnosis, prevalence has been variously reported at 6% to 70% among reproductive-aged women.^4,5

In this review, we first examine the clinical presentation and diagnosis of adenomyosis. We then discuss clinical indications for, and surgical techniques of, adenomyomectomy, including our preferred uterine-sparing approach for focal disease or when the patient wants to preserve fertility: video laparoscopic resection with or without robotic assistance, aided by minilaparotomy when indicated.

Treatment evolved in a century and a half

Adenomyosis was first described more than 150 years ago; historically, hysterectomy was the mainstay of treatment.^2,6 Conservative surgical treatment for adenomyosis has been reported since the early 1950s.^6-8 Surgical treatment initially became more widespread following the introduction of wedge resection, which allowed for partial excision of adenomyotic nodules.⁹

More recent developments in diagnostic technologies and capabilities have allowed for the emergence of additional uterine-sparing and minimally invasive surgical treatment options for adenomyosis.^3,10 Although the use of laparoscopic approaches is limited because a high level of technical skill is required to undertake these procedures, such approaches are becoming increasingly important as more and more patients seek fertility conservation.^11-13

How does adenomyosis present?

Adenomyosis symptoms commonly consist of abnormal uterine bleeding and dysmenorrhea, affecting approximately 40% to 60% and 15% to 30% of patients with the condition, respectively.¹⁴ These symptoms are considered nonspecific because they are also associated with other uterine abnormalities.¹⁵ Although menorrhagia is not associated with extent of disease, dysmenorrhea is associated with both the number and depth of adenomyotic foci.¹⁴

Other symptoms reported with adenomyosis include chronic pelvic pain, dyspareunia, as well as infertility. Note, however, that a large percentage of patients are asymptomatic.^16,17

On physical examination, patients commonly exhibit a diffusely enlarged, globular uterus. This finding is secondary to uniform hyperplasia and hypertrophy of the myometrium, caused by stimulation of ectopic endometrial cells.² A subset of patients experience significant uterine tenderness.¹⁸ Other common findings associated with adenomyosis include uterine abnormalities, such as leiomyomata, endometriosis, and endometrial polyps.

Continue to: Two-pronged route to diagnosis and a differential...

Two-pronged route to diagnosis and a differential

Histology

Adenomyosis is definitively diagnosed based on histologic findings of endometrial-like tissue within the myometrium. Historically, histologic analysis was performed on specimens following hysterectomy but, more recently, has utilized specimens obtained from hysteroscopic and laparoscopic myometrial biopsies.¹⁹ Importantly, although hysteroscopic and laparoscopic biopsies are taken under direct visualization, there are no pathognomonic signs for adenomyosis; a diagnosis can therefore be missed if adenomyosis is not present at biopsied sites.¹ The sensitivity of random biopsy at laparoscopy has been found to be as low as 2% to as high as 56%.²⁰

Imaging

Imaging can be helpful in clinical decision making and to guide the differential diagnosis. Transvaginal ultrasonography (TVUS) is often the first mode of imaging used for the investigation of abnormal uterine bleeding or pelvic pain. Diagnosis by TVUS is difficult because the modality is operator dependent and standard diagnostic criteria are lacking.⁵

The most commonly reported ultrasonographic features of adenomyosis are^21,22:

• a globally enlarged uterus
• asymmetry
• myometrial thickening with heterogeneity
• poorly defined foci of hyperechoic regions, surrounded by hypoechoic areas that correspond to smooth-muscle hyperplasia
• myometrial cysts.

Doppler ultrasound examination in patients with adenomyosis reveals increased flow to the myometrium without evidence of large blood vessels.

3-dimensional (3-D) ultrasonography. Integration of 3-D ultrasonography has allowed for identification of the thicker junctional zone that suggests adenomyosis. In a systematic review of the accuracy of TVUS, investigators reported a pooled sensitivity and specificity for 2-dimensional ultrasonography of 83.8% and 63.9%, respectively, and a pooled sensitivity and specificity for 3-dimensional ultrasonography of 88.9% and 56.0%, respectively.²²

Magnetic resonance imaging (MRI) is also used in the evaluation of adenomyosis. Although MRI is considered a more accurate diagnostic modality because it is not operator dependent, expense often prohibits its use in the work-up of abnormal uterine bleeding and chronic pelvic pain.^2,23

The most commonly reported MRI findings in adenomyosis include a globular or asymmetric uterus, heterogeneity of myometrial signal intensity, and thickening of the junctional zone²⁴ (FIGURE 1). In a systematic review, researchers reported a pooled sensitivity and specificity of 77% and 89%, respectively, for the diagnosis of adenomyosis using MRI.²⁵

Approaches to treatment

Medical management

No medical therapies or guidelines specific to the treatment of adenomyosis exist.⁹ Often, nonsteroidal anti-inflammatory drugs (NSAIDs) are employed to combat cramping and pain associated with increased prostaglandin levels.²⁶ A systematic review found that NSAIDs are significantly better at treating dysmenorrhea than placebo alone.²⁶

Moreover, adenomyosis is an estrogen-dependent disease; consequently, many medical treatments are targeted at suppressing the hypothalamic–pituitary–ovarian axis and inducing endometrial atrophy. Medications commonly used (off-label) for this effect include combined or progestin-only oral contraceptive pills, gonadotropin-releasing hormone (GnRH) agonists, levonorgestrel-releasing intrauterine devices, danazol, and aromatase inhibitors.

Use of a GnRH agonist, such as leuprolide, is limited to a short course (<6 months) because menopausal-like symptoms, such as hot flashes, vaginal atrophy, and loss of bone-mineral density, can develop.¹⁶ Symptoms of adenomyosis often return upon cessation of hormonal treatment.¹

Novel therapies are under investigation, including GnRH antagonists, selective progesterone-receptor modulators, and antiplatelet therapy.²⁷

Although there are few data showing the effectiveness of medical therapy on adenomyosis-specific outcomes, medications are particularly useful in patients who are poor surgical candidates or who may prefer not to undergo surgery. Furthermore, medical therapy has considerable use in conjunction with surgical intervention; a prospective observational study showed that women who underwent GnRH agonist treatment following surgery had significantly greater improvement of their dysmenorrhea and menorrhagia, compared with those who underwent surgery only.²⁸ In addition, preoperative administration of a GnRH agonist or danazol several months prior to surgery has been shown to reduce uterine vascularity and, thus, blood loss at surgery.^29,30

Continue to: Surgery

Surgery

The objective of surgical management is to ameliorate symptoms in a conservative manner, by excision or cytoreduction of adenomyotic lesions, while preserving, even improving, fertility.^3,11,31 The choice of procedure depends, ultimately, on the location and extent of disease, the patient’s desire for uterine preservation and fertility, and surgical skill.³

Historically, hysterectomy was used to treat adenomyosis; for patients declining fertility preservation, hysterectomy remains the definitive treatment. Since the early 1950s, several techniques for laparotomic reduction have been developed. Surgeries that achieve partial reduction include:

Wedge resection of the uterine wall entails removal of the seromuscular layer at the identified location of adenomyotic tissue, with subsequent repair of the remaining muscular and serosal layers surrounding the wound.^3,32 Because adenomyotic tissue can remain on either side of the incision in wedge resection, clinical improvement in symptoms of dysmenorrhea and menorrhagia are modest, and recurrence is possible.⁷

Modified reduction surgery. Modifications of reduction surgery include slicing adenomyotic tissue using microsurgery and partial excision.³³

Transverse-H incision of the uterine wall involves a transverse incision on the uterine fundus, separating serosa and myometrium, followed by removal of diseased tissue using an electrosurgical scalpel or scissors. Tensionless suturing is used to close the myometrial layers in 1 or 2 layers to establish hemostasis and close the defect; serosal flaps are closed with subserosal interrupted sutures.³⁴ Data show that, following surgery with this technique, 21.4% to 38.7% of patients who attempt conception achieve clinical pregnancy.⁷

Complete, conservative resection in cases of diffuse and focal adenomyosis is possible using the triple-flap method, in which total resection is achieved by removing diseased myometrium until healthy, soft tissue—with normal texture, color, and vascularity—is reached.² Repair with this technique reduces the risk of uterine rupture by reconstructing the uterine wall using a muscle flap prepared by metroplasty.⁷ In a study of 64 women who underwent triple-flap resection, a clinical pregnancy rate of 74% and a live birth rate of 52% were reported.⁷

Minimally invasive approaches. Although several techniques have been developed for focal excision of adenomyosis by laparotomy,⁷ the trend has been toward minimally invasive surgery, which reduces estimated blood loss, decreases length of stay, and reduces adhesion formation—all without a statistically significant difference in long-term clinical outcomes, compared to other techniques.^35-39 Furthermore, enhanced visualization of pelvic organs provided by laparoscopy is vital in the case of adenomyosis.^3,31

How our group approaches surgical management. A challenge in laparoscopic surgery of adenomyosis is extraction of an extensive amount of diseased tissue. In 1994, our group described the use of simultaneous operative laparoscopy and minilaparotomy technique as an effective and safe alternative to laparotomy in the treatment of myomectomy⁶; the surgical principles of that approach are applied to adenomyomectomy. The technique involves treatment of pelvic pathology with laparoscopy, removal of tissue through the minilaparotomy incision, and repair of the uterine wall defect in layers.

References

1. Struble J, Reid S, Bedaiwy MA. Adenomyosis: a clinical review of a challenging gynecologic condition. J Minim Invasive Gynecol.2016; 23:164-185.
2. García-Solares J, Donnez J, Donnez O, et al. Pathogenesis of uterine adenomyosis: invagination or metaplasia? Fertil Steril.2018;109:371-379.
3. Ferenczy A. Pathophysiology of adenomyosis. Hum Reprod Update. 1998;4:312-322.
4. Gargett CE. Uterine stem cells: what is the evidence? Hum Reprod Update. 2007;13:87-101.
5. Chan RW, Schwab KE, Gargett CE. Clonogenicity of human endometrial epithelial and stromal cells. Biol Reprod. 2004;70:1738-1750.
6. Schwab KE, Chan RWS, Gargett CE. Putative stem cell activity of human endometrial epithelial and stromal cells during the menstrual cycle. Fertil Steril. 2005;84(Suppl 2):1124-1130.
7. Sasson IE, Taylor HS. Stem cells and the pathogenesis of endometriosis. Ann N Y Acad Sci. 2008;1127:106-115.
8. Du H, Taylor HS. Stem cells and female reproduction. Reprod Sci. 2009;16:126-139.
9. Acloque H, Adams MS, Fishwick K, et al. Epithelial-mesenchymal transitions: the importance of changing cell state in development and disease. J Clin Invest. 2009;119:1438-1449.

Continue to: In 57 women who underwent…

In 57 women who underwent this procedure, the mean operative time was 127 minutes; average estimated blood loss was 267 mL.⁴⁰ Overall, laparoscopy with minilaparotomy was found to be a less technically difficult technique for laparoscopic myomectomy; allowed better closure of the uterine defect; and might have required less time to perform.³

We therefore advocate video laparoscopic wedge resection with or without robotic assistance, aided by minilaparotomy when necessary for safe removal of larger adenomyomas, as the preferred uterine-sparing surgical approach for focal adenomyosis or when the patient wants to preserve fertility (FIGURE 2). We think that this technique allows focal adenomyosis to be treated by wedge resection of the diseased myometrium, with subsequent closure of the remaining myometrial defect using a barbed V-Loc (Medtronic, Minneapolis, Minnesota) delayed absorbable suture in layers (FIGURE 3). Minilaparotomy can be utilized when indicated to aid removal of the resected myometrial specimen.

In our extensive experience, we have found that this technique provides significant relief of symptoms and improvements in fertility outcomes while minimizing surgical morbidity.

CASE Resolved

The patient underwent successful wedge resection of her adenomyosis by laparoscopy. She experienced nearly complete resolution of her symptoms of dysmenorrhea, menorrhagia, and pelvic pain. She retained good uterine integrity. Three years later, she and her husband became parents when she delivered their first child by cesarean delivery at full term. After she completed childbearing, she ultimately opted for minimally invasive hysterectomy.

The authors would like to acknowledge Mailinh Vu, MD, Fellow at Camran Nezhat Institute, for reviewing and editing this article.

CASE
A 28-year-old patient presents for evaluation and management of her chronic pelvic pain, dysmenorrhea, and menorrhagia. She previously tried ibuprofen with no pain relief. She also tried oral and long-acting reversible contraceptives but continued to be symptomatic. She underwent pelvic sonography, which demonstrated a large globular uterus with myometrial thickening and myometrial cysts with increased hypervascularity. Subsequent magnetic resonance imaging indicated a thickened junctional zone. Feeling she had exhausted medical manegement options with no significant improvement, she desired surgical treatment, but wanted to retain her future fertility. As a newlywed, she and her husband were planning on building a family so she desired to retain her uterus for potential future pregnancy.

How would you address this patient’s disruptive symptoms, while affirming her long-term plans by choosing the proper intervention?

Adenomyosis is characterized by endometrial-like glands and stroma deep within the myometrium of the uterus and generally is classified as diffuse or focal. This common, benign gynecologic condition is known to cause enlargement of the uterus secondary to stimulation of ectopic endometrial-like cells.^1-3 Although the true incidence of adenomyosis is unknown because of the difficulty of making the diagnosis, prevalence has been variously reported at 6% to 70% among reproductive-aged women.^4,5

In this review, we first examine the clinical presentation and diagnosis of adenomyosis. We then discuss clinical indications for, and surgical techniques of, adenomyomectomy, including our preferred uterine-sparing approach for focal disease or when the patient wants to preserve fertility: video laparoscopic resection with or without robotic assistance, aided by minilaparotomy when indicated.

Treatment evolved in a century and a half

Adenomyosis was first described more than 150 years ago; historically, hysterectomy was the mainstay of treatment.^2,6 Conservative surgical treatment for adenomyosis has been reported since the early 1950s.^6-8 Surgical treatment initially became more widespread following the introduction of wedge resection, which allowed for partial excision of adenomyotic nodules.⁹

More recent developments in diagnostic technologies and capabilities have allowed for the emergence of additional uterine-sparing and minimally invasive surgical treatment options for adenomyosis.^3,10 Although the use of laparoscopic approaches is limited because a high level of technical skill is required to undertake these procedures, such approaches are becoming increasingly important as more and more patients seek fertility conservation.^11-13

How does adenomyosis present?

Adenomyosis symptoms commonly consist of abnormal uterine bleeding and dysmenorrhea, affecting approximately 40% to 60% and 15% to 30% of patients with the condition, respectively.¹⁴ These symptoms are considered nonspecific because they are also associated with other uterine abnormalities.¹⁵ Although menorrhagia is not associated with extent of disease, dysmenorrhea is associated with both the number and depth of adenomyotic foci.¹⁴

Other symptoms reported with adenomyosis include chronic pelvic pain, dyspareunia, as well as infertility. Note, however, that a large percentage of patients are asymptomatic.^16,17

On physical examination, patients commonly exhibit a diffusely enlarged, globular uterus. This finding is secondary to uniform hyperplasia and hypertrophy of the myometrium, caused by stimulation of ectopic endometrial cells.² A subset of patients experience significant uterine tenderness.¹⁸ Other common findings associated with adenomyosis include uterine abnormalities, such as leiomyomata, endometriosis, and endometrial polyps.

Continue to: Two-pronged route to diagnosis and a differential...

Two-pronged route to diagnosis and a differential

Histology

Adenomyosis is definitively diagnosed based on histologic findings of endometrial-like tissue within the myometrium. Historically, histologic analysis was performed on specimens following hysterectomy but, more recently, has utilized specimens obtained from hysteroscopic and laparoscopic myometrial biopsies.¹⁹ Importantly, although hysteroscopic and laparoscopic biopsies are taken under direct visualization, there are no pathognomonic signs for adenomyosis; a diagnosis can therefore be missed if adenomyosis is not present at biopsied sites.¹ The sensitivity of random biopsy at laparoscopy has been found to be as low as 2% to as high as 56%.²⁰

Imaging

Imaging can be helpful in clinical decision making and to guide the differential diagnosis. Transvaginal ultrasonography (TVUS) is often the first mode of imaging used for the investigation of abnormal uterine bleeding or pelvic pain. Diagnosis by TVUS is difficult because the modality is operator dependent and standard diagnostic criteria are lacking.⁵

The most commonly reported ultrasonographic features of adenomyosis are^21,22:

• a globally enlarged uterus
• asymmetry
• myometrial thickening with heterogeneity
• poorly defined foci of hyperechoic regions, surrounded by hypoechoic areas that correspond to smooth-muscle hyperplasia
• myometrial cysts.

Doppler ultrasound examination in patients with adenomyosis reveals increased flow to the myometrium without evidence of large blood vessels.

3-dimensional (3-D) ultrasonography. Integration of 3-D ultrasonography has allowed for identification of the thicker junctional zone that suggests adenomyosis. In a systematic review of the accuracy of TVUS, investigators reported a pooled sensitivity and specificity for 2-dimensional ultrasonography of 83.8% and 63.9%, respectively, and a pooled sensitivity and specificity for 3-dimensional ultrasonography of 88.9% and 56.0%, respectively.²²

Magnetic resonance imaging (MRI) is also used in the evaluation of adenomyosis. Although MRI is considered a more accurate diagnostic modality because it is not operator dependent, expense often prohibits its use in the work-up of abnormal uterine bleeding and chronic pelvic pain.^2,23

The most commonly reported MRI findings in adenomyosis include a globular or asymmetric uterus, heterogeneity of myometrial signal intensity, and thickening of the junctional zone²⁴ (FIGURE 1). In a systematic review, researchers reported a pooled sensitivity and specificity of 77% and 89%, respectively, for the diagnosis of adenomyosis using MRI.²⁵

Approaches to treatment

Medical management

No medical therapies or guidelines specific to the treatment of adenomyosis exist.⁹ Often, nonsteroidal anti-inflammatory drugs (NSAIDs) are employed to combat cramping and pain associated with increased prostaglandin levels.²⁶ A systematic review found that NSAIDs are significantly better at treating dysmenorrhea than placebo alone.²⁶

Moreover, adenomyosis is an estrogen-dependent disease; consequently, many medical treatments are targeted at suppressing the hypothalamic–pituitary–ovarian axis and inducing endometrial atrophy. Medications commonly used (off-label) for this effect include combined or progestin-only oral contraceptive pills, gonadotropin-releasing hormone (GnRH) agonists, levonorgestrel-releasing intrauterine devices, danazol, and aromatase inhibitors.

Use of a GnRH agonist, such as leuprolide, is limited to a short course (<6 months) because menopausal-like symptoms, such as hot flashes, vaginal atrophy, and loss of bone-mineral density, can develop.¹⁶ Symptoms of adenomyosis often return upon cessation of hormonal treatment.¹

Novel therapies are under investigation, including GnRH antagonists, selective progesterone-receptor modulators, and antiplatelet therapy.²⁷

Although there are few data showing the effectiveness of medical therapy on adenomyosis-specific outcomes, medications are particularly useful in patients who are poor surgical candidates or who may prefer not to undergo surgery. Furthermore, medical therapy has considerable use in conjunction with surgical intervention; a prospective observational study showed that women who underwent GnRH agonist treatment following surgery had significantly greater improvement of their dysmenorrhea and menorrhagia, compared with those who underwent surgery only.²⁸ In addition, preoperative administration of a GnRH agonist or danazol several months prior to surgery has been shown to reduce uterine vascularity and, thus, blood loss at surgery.^29,30

Continue to: Surgery

Surgery

The objective of surgical management is to ameliorate symptoms in a conservative manner, by excision or cytoreduction of adenomyotic lesions, while preserving, even improving, fertility.^3,11,31 The choice of procedure depends, ultimately, on the location and extent of disease, the patient’s desire for uterine preservation and fertility, and surgical skill.³

Historically, hysterectomy was used to treat adenomyosis; for patients declining fertility preservation, hysterectomy remains the definitive treatment. Since the early 1950s, several techniques for laparotomic reduction have been developed. Surgeries that achieve partial reduction include:

Wedge resection of the uterine wall entails removal of the seromuscular layer at the identified location of adenomyotic tissue, with subsequent repair of the remaining muscular and serosal layers surrounding the wound.^3,32 Because adenomyotic tissue can remain on either side of the incision in wedge resection, clinical improvement in symptoms of dysmenorrhea and menorrhagia are modest, and recurrence is possible.⁷

Modified reduction surgery. Modifications of reduction surgery include slicing adenomyotic tissue using microsurgery and partial excision.³³

Transverse-H incision of the uterine wall involves a transverse incision on the uterine fundus, separating serosa and myometrium, followed by removal of diseased tissue using an electrosurgical scalpel or scissors. Tensionless suturing is used to close the myometrial layers in 1 or 2 layers to establish hemostasis and close the defect; serosal flaps are closed with subserosal interrupted sutures.³⁴ Data show that, following surgery with this technique, 21.4% to 38.7% of patients who attempt conception achieve clinical pregnancy.⁷

Complete, conservative resection in cases of diffuse and focal adenomyosis is possible using the triple-flap method, in which total resection is achieved by removing diseased myometrium until healthy, soft tissue—with normal texture, color, and vascularity—is reached.² Repair with this technique reduces the risk of uterine rupture by reconstructing the uterine wall using a muscle flap prepared by metroplasty.⁷ In a study of 64 women who underwent triple-flap resection, a clinical pregnancy rate of 74% and a live birth rate of 52% were reported.⁷

Minimally invasive approaches. Although several techniques have been developed for focal excision of adenomyosis by laparotomy,⁷ the trend has been toward minimally invasive surgery, which reduces estimated blood loss, decreases length of stay, and reduces adhesion formation—all without a statistically significant difference in long-term clinical outcomes, compared to other techniques.^35-39 Furthermore, enhanced visualization of pelvic organs provided by laparoscopy is vital in the case of adenomyosis.^3,31

How our group approaches surgical management. A challenge in laparoscopic surgery of adenomyosis is extraction of an extensive amount of diseased tissue. In 1994, our group described the use of simultaneous operative laparoscopy and minilaparotomy technique as an effective and safe alternative to laparotomy in the treatment of myomectomy⁶; the surgical principles of that approach are applied to adenomyomectomy. The technique involves treatment of pelvic pathology with laparoscopy, removal of tissue through the minilaparotomy incision, and repair of the uterine wall defect in layers.

References

1. Struble J, Reid S, Bedaiwy MA. Adenomyosis: a clinical review of a challenging gynecologic condition. J Minim Invasive Gynecol.2016; 23:164-185.
2. García-Solares J, Donnez J, Donnez O, et al. Pathogenesis of uterine adenomyosis: invagination or metaplasia? Fertil Steril.2018;109:371-379.
3. Ferenczy A. Pathophysiology of adenomyosis. Hum Reprod Update. 1998;4:312-322.
4. Gargett CE. Uterine stem cells: what is the evidence? Hum Reprod Update. 2007;13:87-101.
5. Chan RW, Schwab KE, Gargett CE. Clonogenicity of human endometrial epithelial and stromal cells. Biol Reprod. 2004;70:1738-1750.
6. Schwab KE, Chan RWS, Gargett CE. Putative stem cell activity of human endometrial epithelial and stromal cells during the menstrual cycle. Fertil Steril. 2005;84(Suppl 2):1124-1130.
7. Sasson IE, Taylor HS. Stem cells and the pathogenesis of endometriosis. Ann N Y Acad Sci. 2008;1127:106-115.
8. Du H, Taylor HS. Stem cells and female reproduction. Reprod Sci. 2009;16:126-139.
9. Acloque H, Adams MS, Fishwick K, et al. Epithelial-mesenchymal transitions: the importance of changing cell state in development and disease. J Clin Invest. 2009;119:1438-1449.

Continue to: In 57 women who underwent…

In 57 women who underwent this procedure, the mean operative time was 127 minutes; average estimated blood loss was 267 mL.⁴⁰ Overall, laparoscopy with minilaparotomy was found to be a less technically difficult technique for laparoscopic myomectomy; allowed better closure of the uterine defect; and might have required less time to perform.³

We therefore advocate video laparoscopic wedge resection with or without robotic assistance, aided by minilaparotomy when necessary for safe removal of larger adenomyomas, as the preferred uterine-sparing surgical approach for focal adenomyosis or when the patient wants to preserve fertility (FIGURE 2). We think that this technique allows focal adenomyosis to be treated by wedge resection of the diseased myometrium, with subsequent closure of the remaining myometrial defect using a barbed V-Loc (Medtronic, Minneapolis, Minnesota) delayed absorbable suture in layers (FIGURE 3). Minilaparotomy can be utilized when indicated to aid removal of the resected myometrial specimen.

In our extensive experience, we have found that this technique provides significant relief of symptoms and improvements in fertility outcomes while minimizing surgical morbidity.

CASE Resolved

The patient underwent successful wedge resection of her adenomyosis by laparoscopy. She experienced nearly complete resolution of her symptoms of dysmenorrhea, menorrhagia, and pelvic pain. She retained good uterine integrity. Three years later, she and her husband became parents when she delivered their first child by cesarean delivery at full term. After she completed childbearing, she ultimately opted for minimally invasive hysterectomy.

The authors would like to acknowledge Mailinh Vu, MD, Fellow at Camran Nezhat Institute, for reviewing and editing this article.

Cesarean delivery is one of the most common surgical procedures in women, with rates of 30% or more in the United States.¹ As a result, the rate is rising for cesarean scar defect—the presence of a “niche” at the site of cesarean delivery scar—with the reported prevalence between 24% and 70% in a random population of women with at least one cesarean delivery.² Other terms for cesarean scar defect include a niche, isthmocele, uteroperitoneal fistula, and diverticulum.^1–9

Formation of cesarean scar defect

Cesarean scar defect forms after cesarean delivery, at the site of hysterotomy, on the anterior wall of the uterine isthmus (FIGURE 1). While this is the typical location, the defect has also been found at the endocervical canal and mid-uterine body. Improper healing of the cesarean incision leads to thinning of the anterior uterine wall, which creates an indentation and fluid-filled pouch at the cesarean scar site. The exact reason why a niche develops has not yet been determined; however, there are several hypotheses, broken down by pregnancy-related and patient-related factors. Surgical techniques that may increase the chance of niche development include low (cervical) hysterotomy, single-layer uterine wall closure, use of locking sutures, closure of hysterotomy with endometrial-sparing technique, and multiple cesarean deliveries.^3,4 Patients with medical conditions that may impact wound healing (such as diabetes and smoking) may be at increased risk for niche formation.

Viewed hysteroscopically, the defect appears as a concave shape in the anterior uterine wall; to the inexperienced eye, it may resemble a second cavity (FIGURE 2).

Pelvic pain and other serious consequences

The presence of fibrotic tissue in the niche acts like a valve, leading to the accumulation of blood in this reservoir-like area. A niche thus can cause delayed menstruation through the cervix, resulting in abnormal bleeding, pelvic pain, vaginal discharge, dysmenorrhea, dyspareunia, and infertility. Accumulated blood in this area can ultimately degrade cervical mucus and sperm quality, as well as inhibit sperm transport, a proposed mechanism of infertility.^5,6 Women with a niche who conceive are at potential risk for cesarean scar ectopic pregnancy, with the embryo implanting in the pouch and subsequently growing and developing improperly.

Read about evaluation and treatment.

Evaluation and treatment

Patients presenting with the symptoms de-scribed above who have had a prior cesarean delivery should be evaluated for a cesarean scar defect.⁹ The best time to assess for the abnormality is after the patient’s menstrual cycle, when the endometrial lining is at its thinnest and recently menstruated blood has collected in the defect (this can highlight the niche on imaging). Transvaginal ultrasonography (FIGURE 3) or saline-infusion sonohysterogram serve as a first-line test for in-office diagnosis.⁷ Magnetic resonance imaging (MRI), 3-D ultrasonography, and hysteroscopy are additional useful imaging modalities that can aid in the diagnosis.

Treatments for cesarean scar defect vary dramatically and include hormonal therapy, hysteroscopic resection, vaginal or laparoscopic repair, and hysterectomy. Nonsurgical treatment should be reserved for women who desire a noninvasive approach, as the evidence for symptom resolution is limited.⁸

To promote fertility and decrease symptoms, the abnormal, fibrotic tissue must be removed. In our experience, since 2003, we have found that use of a laparoscopic approach is best for women desiring future fertility and that hysteroscopic resection is best for women whose childbearing is completed.⁹ Our management is dictated by the patient’s fertility plans, since there is concern that cesarean scar defect in a gravid uterus presents a risk for uterine rupture. The laparoscopic approach allows the defect to be repaired and the integrity of the myometrium restored.⁹

Read about techniques for repair.

Techniques for repairing cesarean scar defect

For hysteroscopic resection of a niche, the uterus is distended and the intrauterine defect is visualized hysteroscopically, as seen in FIGURE 2. Using a bipolar or unipolar resectoscope, resect the fibrotic tissue of the defect and endometrial-like glands present within the niche. The goal of this relatively quick procedure is to open up the reservoir and facilitate the complete drainage of menstrual blood, thus alleviating the patient’s symptoms.Postoperatively, follow the patient for symptom resolution, and evaluate for defect resolution with transvaginal ultrasonography.

For a laparoscopic repair, first identify the niche hysteroscopically. At the same time as hysteroscopic examination of the cavity, the defect can be evaluated laparoscopically (FIGURE 4). The light from the hysteroscope can be visualized easily laparoscopically because of the thinned myometrium in the area of the defect. Map out the niche by transvaginally passing a cervical dilator into the defect in the uterine cavity (FIGURE 5). Again, given the thinning of this segment of the uterus, the dilator can be easily visualized laparoscopically. Be cautious when placing this dilator, as there is often overlying bladder. Prevent incidental cystotomy by gently advancing the dilator into the defect only until the niche can be adequately detected.⁹At this point, develop a bladder flap by opening the vesicovaginal and vesicocervical space, mobilizing the bladder inferiorly (FIGURE 6). With the guide of the dilator mapping out the defect (FIGURE 7), excise the fibrotic edges of the niche with thermal energy (monopolar cautery or CO₂ laser) or sharp dissection (FIGURE 8). This leaves healthy myometrial tissue margins. Reapproximate these margins with absorbable suture (2-0 polyglactin 910 [Vicryl]) in an interrupted or running fashion, in 2 layers⁹ (FIGURE 9). Following the laparoscopic repair, perform hysteroscopic evaluation of the uterine cavity to assure complete resolution of the defect (FIGURE 10). With the hysteroscope in place, perform concurrent laparoscopic assessment of the repair. Check for impermeability by assuring no hysteroscopic fluid escapes at the site of repaired hysterotomy.⁹

Postoperative care requires following the patient for symptom resolution and counseling regarding future fertility plans. We recommend that patients wait 6 months following the procedure before attempting conception.

When it comes to recommendations regarding preventing cesarean scar defects, additional randomized controlled trials need to be performed to evaluate various surgical techniques. At this time, there is no conclusive evidence that one method of hysterotomy closure is superior to another in preventing cesarean scar defect.

Symptoms often resolve with repair

When a patient with a prior cesarean delivery presents with symptoms of abnormal uterine bleeding, vaginal discharge, dysmenorrhea, dyspareunia, pelvic pain, or infertility that remain unexplained, consider cesarean scar defect as the culprit. Once a diagnosis of niche has been confirmed, the treatment approach should be dictated by the patient’s plans for future fertility. Hysteroscopic resection has been reported to have a 92% to 100% success rate for resolving symptoms of pain and bleeding, while 75% of patients undergoing laparoscopic niche repair for infertility achieved pregnancy.^10,11 In our practice, a majority of patients experience symptom relief and go on to carry healthy pregnancies.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

Cesarean delivery is one of the most common surgical procedures in women, with rates of 30% or more in the United States.¹ As a result, the rate is rising for cesarean scar defect—the presence of a “niche” at the site of cesarean delivery scar—with the reported prevalence between 24% and 70% in a random population of women with at least one cesarean delivery.² Other terms for cesarean scar defect include a niche, isthmocele, uteroperitoneal fistula, and diverticulum.^1–9

Formation of cesarean scar defect

Cesarean scar defect forms after cesarean delivery, at the site of hysterotomy, on the anterior wall of the uterine isthmus (FIGURE 1). While this is the typical location, the defect has also been found at the endocervical canal and mid-uterine body. Improper healing of the cesarean incision leads to thinning of the anterior uterine wall, which creates an indentation and fluid-filled pouch at the cesarean scar site. The exact reason why a niche develops has not yet been determined; however, there are several hypotheses, broken down by pregnancy-related and patient-related factors. Surgical techniques that may increase the chance of niche development include low (cervical) hysterotomy, single-layer uterine wall closure, use of locking sutures, closure of hysterotomy with endometrial-sparing technique, and multiple cesarean deliveries.^3,4 Patients with medical conditions that may impact wound healing (such as diabetes and smoking) may be at increased risk for niche formation.

Viewed hysteroscopically, the defect appears as a concave shape in the anterior uterine wall; to the inexperienced eye, it may resemble a second cavity (FIGURE 2).

Pelvic pain and other serious consequences

The presence of fibrotic tissue in the niche acts like a valve, leading to the accumulation of blood in this reservoir-like area. A niche thus can cause delayed menstruation through the cervix, resulting in abnormal bleeding, pelvic pain, vaginal discharge, dysmenorrhea, dyspareunia, and infertility. Accumulated blood in this area can ultimately degrade cervical mucus and sperm quality, as well as inhibit sperm transport, a proposed mechanism of infertility.^5,6 Women with a niche who conceive are at potential risk for cesarean scar ectopic pregnancy, with the embryo implanting in the pouch and subsequently growing and developing improperly.

Read about evaluation and treatment.

Evaluation and treatment

Patients presenting with the symptoms de-scribed above who have had a prior cesarean delivery should be evaluated for a cesarean scar defect.⁹ The best time to assess for the abnormality is after the patient’s menstrual cycle, when the endometrial lining is at its thinnest and recently menstruated blood has collected in the defect (this can highlight the niche on imaging). Transvaginal ultrasonography (FIGURE 3) or saline-infusion sonohysterogram serve as a first-line test for in-office diagnosis.⁷ Magnetic resonance imaging (MRI), 3-D ultrasonography, and hysteroscopy are additional useful imaging modalities that can aid in the diagnosis.

Treatments for cesarean scar defect vary dramatically and include hormonal therapy, hysteroscopic resection, vaginal or laparoscopic repair, and hysterectomy. Nonsurgical treatment should be reserved for women who desire a noninvasive approach, as the evidence for symptom resolution is limited.⁸

To promote fertility and decrease symptoms, the abnormal, fibrotic tissue must be removed. In our experience, since 2003, we have found that use of a laparoscopic approach is best for women desiring future fertility and that hysteroscopic resection is best for women whose childbearing is completed.⁹ Our management is dictated by the patient’s fertility plans, since there is concern that cesarean scar defect in a gravid uterus presents a risk for uterine rupture. The laparoscopic approach allows the defect to be repaired and the integrity of the myometrium restored.⁹

Read about techniques for repair.

Techniques for repairing cesarean scar defect

For hysteroscopic resection of a niche, the uterus is distended and the intrauterine defect is visualized hysteroscopically, as seen in FIGURE 2. Using a bipolar or unipolar resectoscope, resect the fibrotic tissue of the defect and endometrial-like glands present within the niche. The goal of this relatively quick procedure is to open up the reservoir and facilitate the complete drainage of menstrual blood, thus alleviating the patient’s symptoms.Postoperatively, follow the patient for symptom resolution, and evaluate for defect resolution with transvaginal ultrasonography.

For a laparoscopic repair, first identify the niche hysteroscopically. At the same time as hysteroscopic examination of the cavity, the defect can be evaluated laparoscopically (FIGURE 4). The light from the hysteroscope can be visualized easily laparoscopically because of the thinned myometrium in the area of the defect. Map out the niche by transvaginally passing a cervical dilator into the defect in the uterine cavity (FIGURE 5). Again, given the thinning of this segment of the uterus, the dilator can be easily visualized laparoscopically. Be cautious when placing this dilator, as there is often overlying bladder. Prevent incidental cystotomy by gently advancing the dilator into the defect only until the niche can be adequately detected.⁹At this point, develop a bladder flap by opening the vesicovaginal and vesicocervical space, mobilizing the bladder inferiorly (FIGURE 6). With the guide of the dilator mapping out the defect (FIGURE 7), excise the fibrotic edges of the niche with thermal energy (monopolar cautery or CO₂ laser) or sharp dissection (FIGURE 8). This leaves healthy myometrial tissue margins. Reapproximate these margins with absorbable suture (2-0 polyglactin 910 [Vicryl]) in an interrupted or running fashion, in 2 layers⁹ (FIGURE 9). Following the laparoscopic repair, perform hysteroscopic evaluation of the uterine cavity to assure complete resolution of the defect (FIGURE 10). With the hysteroscope in place, perform concurrent laparoscopic assessment of the repair. Check for impermeability by assuring no hysteroscopic fluid escapes at the site of repaired hysterotomy.⁹

Postoperative care requires following the patient for symptom resolution and counseling regarding future fertility plans. We recommend that patients wait 6 months following the procedure before attempting conception.

When it comes to recommendations regarding preventing cesarean scar defects, additional randomized controlled trials need to be performed to evaluate various surgical techniques. At this time, there is no conclusive evidence that one method of hysterotomy closure is superior to another in preventing cesarean scar defect.

Symptoms often resolve with repair

When a patient with a prior cesarean delivery presents with symptoms of abnormal uterine bleeding, vaginal discharge, dysmenorrhea, dyspareunia, pelvic pain, or infertility that remain unexplained, consider cesarean scar defect as the culprit. Once a diagnosis of niche has been confirmed, the treatment approach should be dictated by the patient’s plans for future fertility. Hysteroscopic resection has been reported to have a 92% to 100% success rate for resolving symptoms of pain and bleeding, while 75% of patients undergoing laparoscopic niche repair for infertility achieved pregnancy.^10,11 In our practice, a majority of patients experience symptom relief and go on to carry healthy pregnancies.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.

Cesarean delivery is one of the most common surgical procedures in women, with rates of 30% or more in the United States.¹ As a result, the rate is rising for cesarean scar defect—the presence of a “niche” at the site of cesarean delivery scar—with the reported prevalence between 24% and 70% in a random population of women with at least one cesarean delivery.² Other terms for cesarean scar defect include a niche, isthmocele, uteroperitoneal fistula, and diverticulum.^1–9

Formation of cesarean scar defect

Cesarean scar defect forms after cesarean delivery, at the site of hysterotomy, on the anterior wall of the uterine isthmus (FIGURE 1). While this is the typical location, the defect has also been found at the endocervical canal and mid-uterine body. Improper healing of the cesarean incision leads to thinning of the anterior uterine wall, which creates an indentation and fluid-filled pouch at the cesarean scar site. The exact reason why a niche develops has not yet been determined; however, there are several hypotheses, broken down by pregnancy-related and patient-related factors. Surgical techniques that may increase the chance of niche development include low (cervical) hysterotomy, single-layer uterine wall closure, use of locking sutures, closure of hysterotomy with endometrial-sparing technique, and multiple cesarean deliveries.^3,4 Patients with medical conditions that may impact wound healing (such as diabetes and smoking) may be at increased risk for niche formation.

Viewed hysteroscopically, the defect appears as a concave shape in the anterior uterine wall; to the inexperienced eye, it may resemble a second cavity (FIGURE 2).

Pelvic pain and other serious consequences

The presence of fibrotic tissue in the niche acts like a valve, leading to the accumulation of blood in this reservoir-like area. A niche thus can cause delayed menstruation through the cervix, resulting in abnormal bleeding, pelvic pain, vaginal discharge, dysmenorrhea, dyspareunia, and infertility. Accumulated blood in this area can ultimately degrade cervical mucus and sperm quality, as well as inhibit sperm transport, a proposed mechanism of infertility.^5,6 Women with a niche who conceive are at potential risk for cesarean scar ectopic pregnancy, with the embryo implanting in the pouch and subsequently growing and developing improperly.

Read about evaluation and treatment.

Evaluation and treatment

Patients presenting with the symptoms de-scribed above who have had a prior cesarean delivery should be evaluated for a cesarean scar defect.⁹ The best time to assess for the abnormality is after the patient’s menstrual cycle, when the endometrial lining is at its thinnest and recently menstruated blood has collected in the defect (this can highlight the niche on imaging). Transvaginal ultrasonography (FIGURE 3) or saline-infusion sonohysterogram serve as a first-line test for in-office diagnosis.⁷ Magnetic resonance imaging (MRI), 3-D ultrasonography, and hysteroscopy are additional useful imaging modalities that can aid in the diagnosis.

Treatments for cesarean scar defect vary dramatically and include hormonal therapy, hysteroscopic resection, vaginal or laparoscopic repair, and hysterectomy. Nonsurgical treatment should be reserved for women who desire a noninvasive approach, as the evidence for symptom resolution is limited.⁸

To promote fertility and decrease symptoms, the abnormal, fibrotic tissue must be removed. In our experience, since 2003, we have found that use of a laparoscopic approach is best for women desiring future fertility and that hysteroscopic resection is best for women whose childbearing is completed.⁹ Our management is dictated by the patient’s fertility plans, since there is concern that cesarean scar defect in a gravid uterus presents a risk for uterine rupture. The laparoscopic approach allows the defect to be repaired and the integrity of the myometrium restored.⁹

Read about techniques for repair.

Techniques for repairing cesarean scar defect

For hysteroscopic resection of a niche, the uterus is distended and the intrauterine defect is visualized hysteroscopically, as seen in FIGURE 2. Using a bipolar or unipolar resectoscope, resect the fibrotic tissue of the defect and endometrial-like glands present within the niche. The goal of this relatively quick procedure is to open up the reservoir and facilitate the complete drainage of menstrual blood, thus alleviating the patient’s symptoms.Postoperatively, follow the patient for symptom resolution, and evaluate for defect resolution with transvaginal ultrasonography.

For a laparoscopic repair, first identify the niche hysteroscopically. At the same time as hysteroscopic examination of the cavity, the defect can be evaluated laparoscopically (FIGURE 4). The light from the hysteroscope can be visualized easily laparoscopically because of the thinned myometrium in the area of the defect. Map out the niche by transvaginally passing a cervical dilator into the defect in the uterine cavity (FIGURE 5). Again, given the thinning of this segment of the uterus, the dilator can be easily visualized laparoscopically. Be cautious when placing this dilator, as there is often overlying bladder. Prevent incidental cystotomy by gently advancing the dilator into the defect only until the niche can be adequately detected.⁹At this point, develop a bladder flap by opening the vesicovaginal and vesicocervical space, mobilizing the bladder inferiorly (FIGURE 6). With the guide of the dilator mapping out the defect (FIGURE 7), excise the fibrotic edges of the niche with thermal energy (monopolar cautery or CO₂ laser) or sharp dissection (FIGURE 8). This leaves healthy myometrial tissue margins. Reapproximate these margins with absorbable suture (2-0 polyglactin 910 [Vicryl]) in an interrupted or running fashion, in 2 layers⁹ (FIGURE 9). Following the laparoscopic repair, perform hysteroscopic evaluation of the uterine cavity to assure complete resolution of the defect (FIGURE 10). With the hysteroscope in place, perform concurrent laparoscopic assessment of the repair. Check for impermeability by assuring no hysteroscopic fluid escapes at the site of repaired hysterotomy.⁹

Postoperative care requires following the patient for symptom resolution and counseling regarding future fertility plans. We recommend that patients wait 6 months following the procedure before attempting conception.

When it comes to recommendations regarding preventing cesarean scar defects, additional randomized controlled trials need to be performed to evaluate various surgical techniques. At this time, there is no conclusive evidence that one method of hysterotomy closure is superior to another in preventing cesarean scar defect.

Symptoms often resolve with repair

When a patient with a prior cesarean delivery presents with symptoms of abnormal uterine bleeding, vaginal discharge, dysmenorrhea, dyspareunia, pelvic pain, or infertility that remain unexplained, consider cesarean scar defect as the culprit. Once a diagnosis of niche has been confirmed, the treatment approach should be dictated by the patient’s plans for future fertility. Hysteroscopic resection has been reported to have a 92% to 100% success rate for resolving symptoms of pain and bleeding, while 75% of patients undergoing laparoscopic niche repair for infertility achieved pregnancy.^10,11 In our practice, a majority of patients experience symptom relief and go on to carry healthy pregnancies.

Share your thoughts! Send your Letter to the Editor to [email protected]. Please include your name and the city and state in which you practice.