AVAHO

Key clinical point: Unlike partial breast irradiation (PBI), intraoperative radiation therapy (IORT) was associated with higher ipsilateral breast tumor recurrence (IBTR) rates than whole breast irradiation (WBI) in patients with early-stage breast cancer (BC) who underwent breast-conserving surgery (BCS).

Major finding: The risk for IBTR was comparable in patients treated with PBI and WBI (hazard ratio [HR] 1.20; P = .12) but was significantly higher in patients treated with IORT vs WBI (HR 1.46; P < .01).

Study details: Findings are from a meta-analysis of 11 randomized controlled trials including 15,460 patients with early-stage BC who underwent BCS, of whom 7190 patients, 4931 patients, and 2372 patients received WBI, PBI, and IORT, respectively.

Disclosures: This study did not receive any specific funding. Some authors declared serving as consultants for or receiving grants from various sources.

Source: Ravani LV et al. Comparison of partial-breast irradiation and intraoperative radiation to whole-breast irradiation in early-stage breast cancer patients: A Kaplan-Meier-derived patient data meta-analysis. Breast Cancer Res Treat. 2023 (Sep 22). doi: 10.1007/s10549-023-07112-w

Key clinical point: Unlike partial breast irradiation (PBI), intraoperative radiation therapy (IORT) was associated with higher ipsilateral breast tumor recurrence (IBTR) rates than whole breast irradiation (WBI) in patients with early-stage breast cancer (BC) who underwent breast-conserving surgery (BCS).

Major finding: The risk for IBTR was comparable in patients treated with PBI and WBI (hazard ratio [HR] 1.20; P = .12) but was significantly higher in patients treated with IORT vs WBI (HR 1.46; P < .01).

Study details: Findings are from a meta-analysis of 11 randomized controlled trials including 15,460 patients with early-stage BC who underwent BCS, of whom 7190 patients, 4931 patients, and 2372 patients received WBI, PBI, and IORT, respectively.

Disclosures: This study did not receive any specific funding. Some authors declared serving as consultants for or receiving grants from various sources.

Source: Ravani LV et al. Comparison of partial-breast irradiation and intraoperative radiation to whole-breast irradiation in early-stage breast cancer patients: A Kaplan-Meier-derived patient data meta-analysis. Breast Cancer Res Treat. 2023 (Sep 22). doi: 10.1007/s10549-023-07112-w

Key clinical point: Unlike partial breast irradiation (PBI), intraoperative radiation therapy (IORT) was associated with higher ipsilateral breast tumor recurrence (IBTR) rates than whole breast irradiation (WBI) in patients with early-stage breast cancer (BC) who underwent breast-conserving surgery (BCS).

Major finding: The risk for IBTR was comparable in patients treated with PBI and WBI (hazard ratio [HR] 1.20; P = .12) but was significantly higher in patients treated with IORT vs WBI (HR 1.46; P < .01).

Study details: Findings are from a meta-analysis of 11 randomized controlled trials including 15,460 patients with early-stage BC who underwent BCS, of whom 7190 patients, 4931 patients, and 2372 patients received WBI, PBI, and IORT, respectively.

Disclosures: This study did not receive any specific funding. Some authors declared serving as consultants for or receiving grants from various sources.

Source: Ravani LV et al. Comparison of partial-breast irradiation and intraoperative radiation to whole-breast irradiation in early-stage breast cancer patients: A Kaplan-Meier-derived patient data meta-analysis. Breast Cancer Res Treat. 2023 (Sep 22). doi: 10.1007/s10549-023-07112-w

Key clinical point: Compared with good or low adherence to adjuvant hormone therapy (HT), excellent adherence was associated with a significantly reduced risk for subsequent breast tumors (SBT) in older women with ductal carcinoma in situ (DCIS) of the breast.

Major finding: In patients with excellent vs low adherence to adjuvant HT, both breast-conserving surgery (BCS) and BCS + radiation therapy (RT) significantly reduced the risks for SBT (−10.54 and −6.24 percentage points, respectively; both P < .00001) or subsequent invasive breast cancer (−8.85 and −4.28 percentage points, respectively; both P < .00001). Similar results were obtained in patients with excellent vs good adherence to adjuvant HT.

Study details: Findings are from an analysis of a population-based study including 3075 women with DCIS who were age ≥ 65 years and underwent BCS either with (75%) or without RT (25%).

Disclosures: This study was supported by the US National Cancer Institute. Two authors declared serving as consultants for various sources.

Source: Mitchell JM et al. Adherence to hormonal therapy after surgery among older women with ductal carcinoma in situ: Implications for breast cancer-related adverse health events. Cancer. 2023 (Sep 26). Doi: 10.1002/cncr.35009

Key clinical point: Compared with good or low adherence to adjuvant hormone therapy (HT), excellent adherence was associated with a significantly reduced risk for subsequent breast tumors (SBT) in older women with ductal carcinoma in situ (DCIS) of the breast.

Major finding: In patients with excellent vs low adherence to adjuvant HT, both breast-conserving surgery (BCS) and BCS + radiation therapy (RT) significantly reduced the risks for SBT (−10.54 and −6.24 percentage points, respectively; both P < .00001) or subsequent invasive breast cancer (−8.85 and −4.28 percentage points, respectively; both P < .00001). Similar results were obtained in patients with excellent vs good adherence to adjuvant HT.

Study details: Findings are from an analysis of a population-based study including 3075 women with DCIS who were age ≥ 65 years and underwent BCS either with (75%) or without RT (25%).

Disclosures: This study was supported by the US National Cancer Institute. Two authors declared serving as consultants for various sources.

Source: Mitchell JM et al. Adherence to hormonal therapy after surgery among older women with ductal carcinoma in situ: Implications for breast cancer-related adverse health events. Cancer. 2023 (Sep 26). Doi: 10.1002/cncr.35009

Key clinical point: Compared with good or low adherence to adjuvant hormone therapy (HT), excellent adherence was associated with a significantly reduced risk for subsequent breast tumors (SBT) in older women with ductal carcinoma in situ (DCIS) of the breast.

Major finding: In patients with excellent vs low adherence to adjuvant HT, both breast-conserving surgery (BCS) and BCS + radiation therapy (RT) significantly reduced the risks for SBT (−10.54 and −6.24 percentage points, respectively; both P < .00001) or subsequent invasive breast cancer (−8.85 and −4.28 percentage points, respectively; both P < .00001). Similar results were obtained in patients with excellent vs good adherence to adjuvant HT.

Study details: Findings are from an analysis of a population-based study including 3075 women with DCIS who were age ≥ 65 years and underwent BCS either with (75%) or without RT (25%).

Disclosures: This study was supported by the US National Cancer Institute. Two authors declared serving as consultants for various sources.

Source: Mitchell JM et al. Adherence to hormonal therapy after surgery among older women with ductal carcinoma in situ: Implications for breast cancer-related adverse health events. Cancer. 2023 (Sep 26). Doi: 10.1002/cncr.35009

Key clinical point: Prophylactic salpingo-oophorectomy (PSO) after breast surgery leads to significantly improved overall survival (OS) outcomes and can be considered in patients with BRCA1/2 breast cancer (BC), particularly in those with the BRCA1 variant.

Major finding: Patients who did vs did not undergo PSO had significantly improved OS outcomes in the overall population (hazard ratio [HR] 0.40; P < .001) and in subgroups of patients with BRCA1 BC (HR 0.35;  95% CI 0.20-0.63), triple-negative BC (HR 0.21;  95% CI 0.09-0.46), and invasive ductal carcinoma (HR 0.51;  95% CI 0.31-0.84).

Study details: Findings are from a retrospective cohort study including 480 patients with BRCA1 (n = 290) or BRCA2 (n = 190) BC who underwent surgical resection, of whom 300 and 163 patients underwent PSO and prophylactic mastectomy, respectively.

Disclosures: This study did not disclose any funding source. Two authors declared being advisory board members of or receiving grants or personal fees from various sources unrelated to this study.

Source: Martelli G et al. Prophylactic salpingo-oophorectomy and survival after BRCA1/2 breast cancer resection. JAMA Surg. 2023 (Oct 4). doi: 10.1001/jamasurg.2023.4770

Key clinical point: Prophylactic salpingo-oophorectomy (PSO) after breast surgery leads to significantly improved overall survival (OS) outcomes and can be considered in patients with BRCA1/2 breast cancer (BC), particularly in those with the BRCA1 variant.

Major finding: Patients who did vs did not undergo PSO had significantly improved OS outcomes in the overall population (hazard ratio [HR] 0.40; P < .001) and in subgroups of patients with BRCA1 BC (HR 0.35;  95% CI 0.20-0.63), triple-negative BC (HR 0.21;  95% CI 0.09-0.46), and invasive ductal carcinoma (HR 0.51;  95% CI 0.31-0.84).

Study details: Findings are from a retrospective cohort study including 480 patients with BRCA1 (n = 290) or BRCA2 (n = 190) BC who underwent surgical resection, of whom 300 and 163 patients underwent PSO and prophylactic mastectomy, respectively.

Disclosures: This study did not disclose any funding source. Two authors declared being advisory board members of or receiving grants or personal fees from various sources unrelated to this study.

Source: Martelli G et al. Prophylactic salpingo-oophorectomy and survival after BRCA1/2 breast cancer resection. JAMA Surg. 2023 (Oct 4). doi: 10.1001/jamasurg.2023.4770

Key clinical point: Prophylactic salpingo-oophorectomy (PSO) after breast surgery leads to significantly improved overall survival (OS) outcomes and can be considered in patients with BRCA1/2 breast cancer (BC), particularly in those with the BRCA1 variant.

Major finding: Patients who did vs did not undergo PSO had significantly improved OS outcomes in the overall population (hazard ratio [HR] 0.40; P < .001) and in subgroups of patients with BRCA1 BC (HR 0.35;  95% CI 0.20-0.63), triple-negative BC (HR 0.21;  95% CI 0.09-0.46), and invasive ductal carcinoma (HR 0.51;  95% CI 0.31-0.84).

Study details: Findings are from a retrospective cohort study including 480 patients with BRCA1 (n = 290) or BRCA2 (n = 190) BC who underwent surgical resection, of whom 300 and 163 patients underwent PSO and prophylactic mastectomy, respectively.

Disclosures: This study did not disclose any funding source. Two authors declared being advisory board members of or receiving grants or personal fees from various sources unrelated to this study.

Source: Martelli G et al. Prophylactic salpingo-oophorectomy and survival after BRCA1/2 breast cancer resection. JAMA Surg. 2023 (Oct 4). doi: 10.1001/jamasurg.2023.4770

Key clinical point: The development of contralateral breast cancer (CBC) was associated with worsened survival outcomes if the primary breast cancer (PBC) subtype was hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (ERBB2−) or if the patients had CBC onset within 1.5 years after PBC surgery.

Major finding: Compared with patients who did not develop CBC, the risk for death was higher in patients who developed CBC within 1.5 years after PBC surgery (hazard ratio 2.014; P = .04) and in those with HR+/ERBB2− PBC (hazard ratio 1.882; P = .01).

Study details: Findings are from a cohort study including 16,251 patients with stages 0-III PBC, of whom 418 patients developed CBC.

Disclosures: This study did not report any funding source. The authors declared no conflicts of interest.

Source: Kim H et al. Survival after development of contralateral breast cancer in Korean patients with breast cancer. JAMA Netw Open. 2023;6(9):e2333557 (Sep 14). doi: 10.1001/jamanetworkopen.2023.33557

Key clinical point: The development of contralateral breast cancer (CBC) was associated with worsened survival outcomes if the primary breast cancer (PBC) subtype was hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (ERBB2−) or if the patients had CBC onset within 1.5 years after PBC surgery.

Major finding: Compared with patients who did not develop CBC, the risk for death was higher in patients who developed CBC within 1.5 years after PBC surgery (hazard ratio 2.014; P = .04) and in those with HR+/ERBB2− PBC (hazard ratio 1.882; P = .01).

Study details: Findings are from a cohort study including 16,251 patients with stages 0-III PBC, of whom 418 patients developed CBC.

Disclosures: This study did not report any funding source. The authors declared no conflicts of interest.

Source: Kim H et al. Survival after development of contralateral breast cancer in Korean patients with breast cancer. JAMA Netw Open. 2023;6(9):e2333557 (Sep 14). doi: 10.1001/jamanetworkopen.2023.33557

Key clinical point: The development of contralateral breast cancer (CBC) was associated with worsened survival outcomes if the primary breast cancer (PBC) subtype was hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (ERBB2−) or if the patients had CBC onset within 1.5 years after PBC surgery.

Major finding: Compared with patients who did not develop CBC, the risk for death was higher in patients who developed CBC within 1.5 years after PBC surgery (hazard ratio 2.014; P = .04) and in those with HR+/ERBB2− PBC (hazard ratio 1.882; P = .01).

Study details: Findings are from a cohort study including 16,251 patients with stages 0-III PBC, of whom 418 patients developed CBC.

Disclosures: This study did not report any funding source. The authors declared no conflicts of interest.

Source: Kim H et al. Survival after development of contralateral breast cancer in Korean patients with breast cancer. JAMA Netw Open. 2023;6(9):e2333557 (Sep 14). doi: 10.1001/jamanetworkopen.2023.33557

Key clinical point: Women who were exposed to fine particulate matter, ie, airborne particles with an aerodynamic diameter ≤ 2.5 μm (PM_2.5), showed an increased risk of developing breast cancer (BC), particularly estrogen receptor-positive (ER+) BC.

Major finding: As little as a 10 µg/m³ increase in PM_2.5 concentration during 1980-1984 increased the incident risk for BC by 8% (hazard ratio [HR] 1.08;  95% CI 1.02-1.13), with the risk being even higher in case of ER+ BC (HR 1.10;  95% CI 1.04-1.17).

Study details: Findings are from an analysis of a prospective, US-based cohort including 196,905 women with no prior history of cancer, of whom 15,870 developed incident BC.

Disclosures: This study was funded by the US National Institutes of Environmental Health Sciences and the US National Cancer Institute Intramural Program. The authors declared no conflicts of interest.

Source: White AJ et al. Ambient fine particulate matter and breast cancer incidence in a large prospective US cohort. J Natl Cancer Inst. 2023 (Sep 11). doi: 10.1093/jnci/djad170

Key clinical point: Women who were exposed to fine particulate matter, ie, airborne particles with an aerodynamic diameter ≤ 2.5 μm (PM_2.5), showed an increased risk of developing breast cancer (BC), particularly estrogen receptor-positive (ER+) BC.

Major finding: As little as a 10 µg/m³ increase in PM_2.5 concentration during 1980-1984 increased the incident risk for BC by 8% (hazard ratio [HR] 1.08;  95% CI 1.02-1.13), with the risk being even higher in case of ER+ BC (HR 1.10;  95% CI 1.04-1.17).

Study details: Findings are from an analysis of a prospective, US-based cohort including 196,905 women with no prior history of cancer, of whom 15,870 developed incident BC.

Disclosures: This study was funded by the US National Institutes of Environmental Health Sciences and the US National Cancer Institute Intramural Program. The authors declared no conflicts of interest.

Source: White AJ et al. Ambient fine particulate matter and breast cancer incidence in a large prospective US cohort. J Natl Cancer Inst. 2023 (Sep 11). doi: 10.1093/jnci/djad170

Key clinical point: Women who were exposed to fine particulate matter, ie, airborne particles with an aerodynamic diameter ≤ 2.5 μm (PM_2.5), showed an increased risk of developing breast cancer (BC), particularly estrogen receptor-positive (ER+) BC.

Major finding: As little as a 10 µg/m³ increase in PM_2.5 concentration during 1980-1984 increased the incident risk for BC by 8% (hazard ratio [HR] 1.08;  95% CI 1.02-1.13), with the risk being even higher in case of ER+ BC (HR 1.10;  95% CI 1.04-1.17).

Study details: Findings are from an analysis of a prospective, US-based cohort including 196,905 women with no prior history of cancer, of whom 15,870 developed incident BC.

Disclosures: This study was funded by the US National Institutes of Environmental Health Sciences and the US National Cancer Institute Intramural Program. The authors declared no conflicts of interest.

Source: White AJ et al. Ambient fine particulate matter and breast cancer incidence in a large prospective US cohort. J Natl Cancer Inst. 2023 (Sep 11). doi: 10.1093/jnci/djad170

Key clinical point: Women who survived cancer during childhood and received ≥ 200 mg/m² cumulative doxorubicin dose as a part of the treatment may have an increased risk of developing subsequent breast cancer (SBC).

Major finding: A ≥200 mg/m² cumulative doxorubicin dose vs no doxorubicin treatment led to > 2-fold increase in the risk for SBC (hazard ratio [HR] for 200-299  mg/m²: 2.50, 95% CI 1.85-3.40; HR for 300-399  mg/m²: 2.33, 95% CI 1.68-3.23; and HR for ≥ 400  mg/m²: 2.78, 95% CI 1.99-3.88). Every 100 mg/m² increase in the cumulative doxorubicin dose increased SBC risk in patients who survived cancer and either received (HR 1.11;  95% CI 1.02-1.21) or did not receive chest radiotherapy (HR 1.26;  95% CI 1.17-1.36).

<Study details: Findings are from an analysis of a pooled cohort including 17,903 females who survived cancer for ≥ 5 years, of whom 782 survivors developed SBC.

Disclosures: This study was supported by the Children Cancer Free Foundation (aka Foundation KiKa, Stichting Kinderen Kankervrij), Amsterdam. The authors declared no conflicts of interest.

Source: Wang Y et al for The International Consortium for Pooled Studies on Subsequent Malignancies after Childhood and Adolescent Cancer. Subsequent female breast cancer risk associated with anthracycline chemotherapy for childhood cancer. Nat Med. 2023;29(9):2268-2277 (Sep 11). doi: 10.1038/s41591-023-02514-1

Key clinical point: Women who survived cancer during childhood and received ≥ 200 mg/m² cumulative doxorubicin dose as a part of the treatment may have an increased risk of developing subsequent breast cancer (SBC).

Major finding: A ≥200 mg/m² cumulative doxorubicin dose vs no doxorubicin treatment led to > 2-fold increase in the risk for SBC (hazard ratio [HR] for 200-299  mg/m²: 2.50, 95% CI 1.85-3.40; HR for 300-399  mg/m²: 2.33, 95% CI 1.68-3.23; and HR for ≥ 400  mg/m²: 2.78, 95% CI 1.99-3.88). Every 100 mg/m² increase in the cumulative doxorubicin dose increased SBC risk in patients who survived cancer and either received (HR 1.11;  95% CI 1.02-1.21) or did not receive chest radiotherapy (HR 1.26;  95% CI 1.17-1.36).

<Study details: Findings are from an analysis of a pooled cohort including 17,903 females who survived cancer for ≥ 5 years, of whom 782 survivors developed SBC.

Disclosures: This study was supported by the Children Cancer Free Foundation (aka Foundation KiKa, Stichting Kinderen Kankervrij), Amsterdam. The authors declared no conflicts of interest.

Source: Wang Y et al for The International Consortium for Pooled Studies on Subsequent Malignancies after Childhood and Adolescent Cancer. Subsequent female breast cancer risk associated with anthracycline chemotherapy for childhood cancer. Nat Med. 2023;29(9):2268-2277 (Sep 11). doi: 10.1038/s41591-023-02514-1

Key clinical point: Women who survived cancer during childhood and received ≥ 200 mg/m² cumulative doxorubicin dose as a part of the treatment may have an increased risk of developing subsequent breast cancer (SBC).

Major finding: A ≥200 mg/m² cumulative doxorubicin dose vs no doxorubicin treatment led to > 2-fold increase in the risk for SBC (hazard ratio [HR] for 200-299  mg/m²: 2.50, 95% CI 1.85-3.40; HR for 300-399  mg/m²: 2.33, 95% CI 1.68-3.23; and HR for ≥ 400  mg/m²: 2.78, 95% CI 1.99-3.88). Every 100 mg/m² increase in the cumulative doxorubicin dose increased SBC risk in patients who survived cancer and either received (HR 1.11;  95% CI 1.02-1.21) or did not receive chest radiotherapy (HR 1.26;  95% CI 1.17-1.36).

<Study details: Findings are from an analysis of a pooled cohort including 17,903 females who survived cancer for ≥ 5 years, of whom 782 survivors developed SBC.

Disclosures: This study was supported by the Children Cancer Free Foundation (aka Foundation KiKa, Stichting Kinderen Kankervrij), Amsterdam. The authors declared no conflicts of interest.

Source: Wang Y et al for The International Consortium for Pooled Studies on Subsequent Malignancies after Childhood and Adolescent Cancer. Subsequent female breast cancer risk associated with anthracycline chemotherapy for childhood cancer. Nat Med. 2023;29(9):2268-2277 (Sep 11). doi: 10.1038/s41591-023-02514-1

Key clinical point: The omission of axillary surgery leads to non-inferior outcomes compared to sentinel lymph node biopsy (SLNB) and may not be necessary in patients with early breast cancer (BC) having a tumor diameter ≤ 2 cm and negative results for preoperative axillary lymph node ultrasonography.

Major finding: The rates of 5-year distant disease-free survival were comparable in patients who underwent SLNB and those who did not undergo axillary surgery (97.7% vs 98.0%; hazard ratio 0.84; noninferiority P = .02).

Study details: Findings are from the phase 3 SOUND trial including 1405 women with BC having a tumor diameter ≤ 2 cm and negative preoperative axillary ultrasonography results who were randomly assigned to undergo either SLNB or no axillary surgery.

Disclosures: This study did not disclose any funding source. Some authors declared receiving personal fees from various sources.

Source: Gentilini OD et al for the SOUND Trial Group. Sentinel lymph node biopsy vs no axillary surgery in patients with small breast cancer and negative results on ultrasonography of axillary lymph nodes: The SOUND randomized clinical trial. JAMA Oncol. 2023 (Sep 21). doi: 10.1001/jamaoncol.2023.3759

Key clinical point: The omission of axillary surgery leads to non-inferior outcomes compared to sentinel lymph node biopsy (SLNB) and may not be necessary in patients with early breast cancer (BC) having a tumor diameter ≤ 2 cm and negative results for preoperative axillary lymph node ultrasonography.

Major finding: The rates of 5-year distant disease-free survival were comparable in patients who underwent SLNB and those who did not undergo axillary surgery (97.7% vs 98.0%; hazard ratio 0.84; noninferiority P = .02).

Study details: Findings are from the phase 3 SOUND trial including 1405 women with BC having a tumor diameter ≤ 2 cm and negative preoperative axillary ultrasonography results who were randomly assigned to undergo either SLNB or no axillary surgery.

Disclosures: This study did not disclose any funding source. Some authors declared receiving personal fees from various sources.

Source: Gentilini OD et al for the SOUND Trial Group. Sentinel lymph node biopsy vs no axillary surgery in patients with small breast cancer and negative results on ultrasonography of axillary lymph nodes: The SOUND randomized clinical trial. JAMA Oncol. 2023 (Sep 21). doi: 10.1001/jamaoncol.2023.3759

Key clinical point: The omission of axillary surgery leads to non-inferior outcomes compared to sentinel lymph node biopsy (SLNB) and may not be necessary in patients with early breast cancer (BC) having a tumor diameter ≤ 2 cm and negative results for preoperative axillary lymph node ultrasonography.

Major finding: The rates of 5-year distant disease-free survival were comparable in patients who underwent SLNB and those who did not undergo axillary surgery (97.7% vs 98.0%; hazard ratio 0.84; noninferiority P = .02).

Study details: Findings are from the phase 3 SOUND trial including 1405 women with BC having a tumor diameter ≤ 2 cm and negative preoperative axillary ultrasonography results who were randomly assigned to undergo either SLNB or no axillary surgery.

Disclosures: This study did not disclose any funding source. Some authors declared receiving personal fees from various sources.

Source: Gentilini OD et al for the SOUND Trial Group. Sentinel lymph node biopsy vs no axillary surgery in patients with small breast cancer and negative results on ultrasonography of axillary lymph nodes: The SOUND randomized clinical trial. JAMA Oncol. 2023 (Sep 21). doi: 10.1001/jamaoncol.2023.3759

TOPLINE:

Adoption of doublet therapy – androgen deprivation therapy (ADT) combined with either docetaxel or an androgen receptor pathway inhibitor – has led to a clinically meaningful increase in long-term survival in men with de novo metastatic castration-sensitive prostate cancer, Swedish registry data show.

METHODOLOGY:

• The use of doublet therapy has increased significantly in Sweden in recent years given the growing body of evidence demonstrating that doublet therapy improves survival in individuals with de novo metastatic castration-sensitive prostate cancer.
• Investigators wanted to see whether the increasing use of doublet therapy in this patient population has improved survival when taking various other factors into consideration.
• The analysis, which included 11,382 men diagnosed with metastatic castration-sensitive prostate cancer in Sweden from 2008-2020 and registered in the country’s National Prostate Cancer Register, explored the use of doublet therapy over time and its association with survival, adjusting for age, comorbidities, and cancer characteristics.
• The researchers estimated average 5-year and 10-year survival over time using a survival model.

TAKEAWAY:

• During the study period, patients exhibited a shift toward less advanced prostate cancer, with median prostate-specific antigen (PSA) levels at diagnosis decreasing from 145 to 107 ng/mL in men with metastatic disease.
• Upfront treatment with doublet therapy in these men simultaneously increased from 1% in 2016 to 44% in 2020.
• Adjusted 5-year overall survival increased from 26% between 2008-2012 to 35% in the period 2017-2020; in the 5 years following diagnosis, patients’ mean survival increased by about 6 months between 2008-2012 and 2017-2020.
• The percentage of patients still alive at 10 years doubled from 9% in 2008 to 18% in 2020. Improvements were greater in men younger than 80 years old.

IN PRACTICE:

“A clinically meaningful increase in long-term survival was observed in men diagnosed with de novo [metastatic castration-sensitive prostate cancer] between 2008 and 2020 in Sweden. We argue that the main reason for this improvement was the increased upfront use of doublet therapy,” the authors concluded.

SOURCE:

The study, with first author Christian Corsini, MD, of Uppsala (Sweden) University, was published online in JAMA Network Open.

LIMITATIONS:

Although there were no substantial changes in the diagnostic workup, unmeasured and unknown changes over the years may have affected survival.  The researchers lacked information on PSA levels during follow-up, and therefore could not assess progression-free survival. Some upfront docetaxel use was not captured before 2017.

DISCLOSURES:

The study received funding from the Swedish Cancer Society and Region Uppsala. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

TOPLINE:

Adoption of doublet therapy – androgen deprivation therapy (ADT) combined with either docetaxel or an androgen receptor pathway inhibitor – has led to a clinically meaningful increase in long-term survival in men with de novo metastatic castration-sensitive prostate cancer, Swedish registry data show.

METHODOLOGY:

• The use of doublet therapy has increased significantly in Sweden in recent years given the growing body of evidence demonstrating that doublet therapy improves survival in individuals with de novo metastatic castration-sensitive prostate cancer.
• Investigators wanted to see whether the increasing use of doublet therapy in this patient population has improved survival when taking various other factors into consideration.
• The analysis, which included 11,382 men diagnosed with metastatic castration-sensitive prostate cancer in Sweden from 2008-2020 and registered in the country’s National Prostate Cancer Register, explored the use of doublet therapy over time and its association with survival, adjusting for age, comorbidities, and cancer characteristics.
• The researchers estimated average 5-year and 10-year survival over time using a survival model.

TAKEAWAY:

• During the study period, patients exhibited a shift toward less advanced prostate cancer, with median prostate-specific antigen (PSA) levels at diagnosis decreasing from 145 to 107 ng/mL in men with metastatic disease.
• Upfront treatment with doublet therapy in these men simultaneously increased from 1% in 2016 to 44% in 2020.
• Adjusted 5-year overall survival increased from 26% between 2008-2012 to 35% in the period 2017-2020; in the 5 years following diagnosis, patients’ mean survival increased by about 6 months between 2008-2012 and 2017-2020.
• The percentage of patients still alive at 10 years doubled from 9% in 2008 to 18% in 2020. Improvements were greater in men younger than 80 years old.

IN PRACTICE:

“A clinically meaningful increase in long-term survival was observed in men diagnosed with de novo [metastatic castration-sensitive prostate cancer] between 2008 and 2020 in Sweden. We argue that the main reason for this improvement was the increased upfront use of doublet therapy,” the authors concluded.

SOURCE:

The study, with first author Christian Corsini, MD, of Uppsala (Sweden) University, was published online in JAMA Network Open.

LIMITATIONS:

Although there were no substantial changes in the diagnostic workup, unmeasured and unknown changes over the years may have affected survival.  The researchers lacked information on PSA levels during follow-up, and therefore could not assess progression-free survival. Some upfront docetaxel use was not captured before 2017.

DISCLOSURES:

The study received funding from the Swedish Cancer Society and Region Uppsala. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

TOPLINE:

Adoption of doublet therapy – androgen deprivation therapy (ADT) combined with either docetaxel or an androgen receptor pathway inhibitor – has led to a clinically meaningful increase in long-term survival in men with de novo metastatic castration-sensitive prostate cancer, Swedish registry data show.

METHODOLOGY:

• The use of doublet therapy has increased significantly in Sweden in recent years given the growing body of evidence demonstrating that doublet therapy improves survival in individuals with de novo metastatic castration-sensitive prostate cancer.
• Investigators wanted to see whether the increasing use of doublet therapy in this patient population has improved survival when taking various other factors into consideration.
• The analysis, which included 11,382 men diagnosed with metastatic castration-sensitive prostate cancer in Sweden from 2008-2020 and registered in the country’s National Prostate Cancer Register, explored the use of doublet therapy over time and its association with survival, adjusting for age, comorbidities, and cancer characteristics.
• The researchers estimated average 5-year and 10-year survival over time using a survival model.

TAKEAWAY:

• During the study period, patients exhibited a shift toward less advanced prostate cancer, with median prostate-specific antigen (PSA) levels at diagnosis decreasing from 145 to 107 ng/mL in men with metastatic disease.
• Upfront treatment with doublet therapy in these men simultaneously increased from 1% in 2016 to 44% in 2020.
• Adjusted 5-year overall survival increased from 26% between 2008-2012 to 35% in the period 2017-2020; in the 5 years following diagnosis, patients’ mean survival increased by about 6 months between 2008-2012 and 2017-2020.
• The percentage of patients still alive at 10 years doubled from 9% in 2008 to 18% in 2020. Improvements were greater in men younger than 80 years old.

IN PRACTICE:

“A clinically meaningful increase in long-term survival was observed in men diagnosed with de novo [metastatic castration-sensitive prostate cancer] between 2008 and 2020 in Sweden. We argue that the main reason for this improvement was the increased upfront use of doublet therapy,” the authors concluded.

SOURCE:

The study, with first author Christian Corsini, MD, of Uppsala (Sweden) University, was published online in JAMA Network Open.

LIMITATIONS:

Although there were no substantial changes in the diagnostic workup, unmeasured and unknown changes over the years may have affected survival.  The researchers lacked information on PSA levels during follow-up, and therefore could not assess progression-free survival. Some upfront docetaxel use was not captured before 2017.

DISCLOSURES:

The study received funding from the Swedish Cancer Society and Region Uppsala. The authors reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

CHICAGO—The VA could save nearly $10,000 annually per patient in the Mountain West region referral area by administering lower-level hematology/oncology care within the system instead of in the community, according to a new analysis.

The findings reflect that the community care encouraged by the MISSION Act is more expensive than US Department of Veterans Affairs (VA) care, said report lead author Alyson Clough, PharmD, a clinical pharmacy specialist with the George E. Wahlen Veterans Affairs Medical Center (VAMC) in Salt Lake City, Utah, in an interview. Clough and colleagues presented the poster at the 2023 annual meeting of the Association of VA Hematology/Oncology.

The 2018 MISSION Act expanded the eligibility for non-VA community services within the VA. “If a veteran requires care that a VA cannot provide in-house, lives in a state/territory without a full-service VAMC, and/or lives further than a certain distance/time from a VA Medical Center, then the veteran may be eligible to receive care in the community,” Clough said.

For the new analysis, the researchers focused on the Salt Lake City VAMC referral area, which spans about 125,000 square miles in Utah, Idaho, and Nevada. “While the MISSION Act helped give those veterans more options for specialty care—including hematology/oncology—many veterans are still driving several hours on a routine basis for chemotherapy treatment and injection therapies, even in the community setting,” Clough explained.

The researchers looked at the costs of “low-risk cancer care,” which Clough said consists of “chemotherapy or immunotherapy that is less likely to cause significant side effects during the infusion, is typically nonhazardous, and/or can be administered via a short infusion [30 minutes or less] or an injection.”

In fiscal year 2022, the VA paid more than $5.7 million for community care services for 380 veterans in the referral area, about $15,060 each, according to the analysis. In contrast, the average cost for 1774 veterans within the VA system was $5424. “By retaining or re-establishing hematology/oncology veteran care within VA, we estimate cost savings of approximately $9636 per unique veteran.”

Specifically, the researchers wrote that the average care costs were $5297 per veteran in the community vs $1143 at the VA, and average drug costs were $9763 per veteran in the community vs $4281 in the VA. These amount to total costs of $15,060 per veteran in the community vs $5424 in the VA.

Low-risk services “are ideal to bring to more isolated regions,” Clough noted. “Traveling and/or finding accommodations for pets can be very difficult for veterans during chemotherapy treatments. Bringing care to the veteran increases veteran convenience, reduces need for transportation, reduces out-of-pocket cost to the veteran, and can improve care coordination.”

It’s not clear why VA care is cheaper than community care, she said, “but it may be related to the [higher] patient volumes we see in our VA facilities.” Lower overhead costs and government pricing contracts for chemotherapies/injectables could also be factors, Clough explained. In an interview, Todd Wagner, PhD, Stanford University Professor in the Department of Surgery and Director of the Health Economics Research Center at the VA, said the analysis needs risk adjustment for cancer severity and other illnesses and comorbidities that could affect cancer treatment. “In our work, sicker veterans get care in VA, and healthier veterans are choosing VA-purchased care [in the community].”

He noted that in the new analysis, the VA care looks much cheaper. “I'm struggling with that result: It flies in the face of our past work,” he said. He added that an analysis should also look at surgery and radiation. “VA has a tradition of providing high-value medications at a lower cost. But VA’s costs of surgery and radiation tend to be more expensive.”

Clough does not plan more research in this area. For now, she said, her site is working to expand to include infusion clinics at local VA community-based outpatient clinics as part of the Close to Me program. The program, launched by the VA in 2022, aims to provide cancer services at community-based outpatient clinics, mobile infusion units, and patient homes.

“As part of this service, we are looking to maximize video-based and phone visits between our existing oncology staff and veterans living in more isolated areas, coordinate labs/imaging locally, and deliver infusion and/or injectable therapies to the veteran,” Clough said.

In addition, she said, “We currently have a dedicated hematology/oncology trained pharmacist and 2 infusion nurses working to expand the service and deliver veteran care in these remote areas.”

There was no funding for this study, and the authors have no disclosures. Wagner discloses grant funding to his institutions from the VA, the National Institutes of Health, the Agency for Healthcare Research and Quality, the Robert Wood Johnson Foundation, and the Heinz Foundation. 

CHICAGO—The VA could save nearly $10,000 annually per patient in the Mountain West region referral area by administering lower-level hematology/oncology care within the system instead of in the community, according to a new analysis.

The findings reflect that the community care encouraged by the MISSION Act is more expensive than US Department of Veterans Affairs (VA) care, said report lead author Alyson Clough, PharmD, a clinical pharmacy specialist with the George E. Wahlen Veterans Affairs Medical Center (VAMC) in Salt Lake City, Utah, in an interview. Clough and colleagues presented the poster at the 2023 annual meeting of the Association of VA Hematology/Oncology.

The 2018 MISSION Act expanded the eligibility for non-VA community services within the VA. “If a veteran requires care that a VA cannot provide in-house, lives in a state/territory without a full-service VAMC, and/or lives further than a certain distance/time from a VA Medical Center, then the veteran may be eligible to receive care in the community,” Clough said.

For the new analysis, the researchers focused on the Salt Lake City VAMC referral area, which spans about 125,000 square miles in Utah, Idaho, and Nevada. “While the MISSION Act helped give those veterans more options for specialty care—including hematology/oncology—many veterans are still driving several hours on a routine basis for chemotherapy treatment and injection therapies, even in the community setting,” Clough explained.

The researchers looked at the costs of “low-risk cancer care,” which Clough said consists of “chemotherapy or immunotherapy that is less likely to cause significant side effects during the infusion, is typically nonhazardous, and/or can be administered via a short infusion [30 minutes or less] or an injection.”

In fiscal year 2022, the VA paid more than $5.7 million for community care services for 380 veterans in the referral area, about $15,060 each, according to the analysis. In contrast, the average cost for 1774 veterans within the VA system was $5424. “By retaining or re-establishing hematology/oncology veteran care within VA, we estimate cost savings of approximately $9636 per unique veteran.”

Specifically, the researchers wrote that the average care costs were $5297 per veteran in the community vs $1143 at the VA, and average drug costs were $9763 per veteran in the community vs $4281 in the VA. These amount to total costs of $15,060 per veteran in the community vs $5424 in the VA.

Low-risk services “are ideal to bring to more isolated regions,” Clough noted. “Traveling and/or finding accommodations for pets can be very difficult for veterans during chemotherapy treatments. Bringing care to the veteran increases veteran convenience, reduces need for transportation, reduces out-of-pocket cost to the veteran, and can improve care coordination.”

It’s not clear why VA care is cheaper than community care, she said, “but it may be related to the [higher] patient volumes we see in our VA facilities.” Lower overhead costs and government pricing contracts for chemotherapies/injectables could also be factors, Clough explained. In an interview, Todd Wagner, PhD, Stanford University Professor in the Department of Surgery and Director of the Health Economics Research Center at the VA, said the analysis needs risk adjustment for cancer severity and other illnesses and comorbidities that could affect cancer treatment. “In our work, sicker veterans get care in VA, and healthier veterans are choosing VA-purchased care [in the community].”

He noted that in the new analysis, the VA care looks much cheaper. “I'm struggling with that result: It flies in the face of our past work,” he said. He added that an analysis should also look at surgery and radiation. “VA has a tradition of providing high-value medications at a lower cost. But VA’s costs of surgery and radiation tend to be more expensive.”

Clough does not plan more research in this area. For now, she said, her site is working to expand to include infusion clinics at local VA community-based outpatient clinics as part of the Close to Me program. The program, launched by the VA in 2022, aims to provide cancer services at community-based outpatient clinics, mobile infusion units, and patient homes.

“As part of this service, we are looking to maximize video-based and phone visits between our existing oncology staff and veterans living in more isolated areas, coordinate labs/imaging locally, and deliver infusion and/or injectable therapies to the veteran,” Clough said.

In addition, she said, “We currently have a dedicated hematology/oncology trained pharmacist and 2 infusion nurses working to expand the service and deliver veteran care in these remote areas.”

There was no funding for this study, and the authors have no disclosures. Wagner discloses grant funding to his institutions from the VA, the National Institutes of Health, the Agency for Healthcare Research and Quality, the Robert Wood Johnson Foundation, and the Heinz Foundation. 

CHICAGO—The VA could save nearly $10,000 annually per patient in the Mountain West region referral area by administering lower-level hematology/oncology care within the system instead of in the community, according to a new analysis.

The findings reflect that the community care encouraged by the MISSION Act is more expensive than US Department of Veterans Affairs (VA) care, said report lead author Alyson Clough, PharmD, a clinical pharmacy specialist with the George E. Wahlen Veterans Affairs Medical Center (VAMC) in Salt Lake City, Utah, in an interview. Clough and colleagues presented the poster at the 2023 annual meeting of the Association of VA Hematology/Oncology.

The 2018 MISSION Act expanded the eligibility for non-VA community services within the VA. “If a veteran requires care that a VA cannot provide in-house, lives in a state/territory without a full-service VAMC, and/or lives further than a certain distance/time from a VA Medical Center, then the veteran may be eligible to receive care in the community,” Clough said.

For the new analysis, the researchers focused on the Salt Lake City VAMC referral area, which spans about 125,000 square miles in Utah, Idaho, and Nevada. “While the MISSION Act helped give those veterans more options for specialty care—including hematology/oncology—many veterans are still driving several hours on a routine basis for chemotherapy treatment and injection therapies, even in the community setting,” Clough explained.

The researchers looked at the costs of “low-risk cancer care,” which Clough said consists of “chemotherapy or immunotherapy that is less likely to cause significant side effects during the infusion, is typically nonhazardous, and/or can be administered via a short infusion [30 minutes or less] or an injection.”

In fiscal year 2022, the VA paid more than $5.7 million for community care services for 380 veterans in the referral area, about $15,060 each, according to the analysis. In contrast, the average cost for 1774 veterans within the VA system was $5424. “By retaining or re-establishing hematology/oncology veteran care within VA, we estimate cost savings of approximately $9636 per unique veteran.”

Specifically, the researchers wrote that the average care costs were $5297 per veteran in the community vs $1143 at the VA, and average drug costs were $9763 per veteran in the community vs $4281 in the VA. These amount to total costs of $15,060 per veteran in the community vs $5424 in the VA.

Low-risk services “are ideal to bring to more isolated regions,” Clough noted. “Traveling and/or finding accommodations for pets can be very difficult for veterans during chemotherapy treatments. Bringing care to the veteran increases veteran convenience, reduces need for transportation, reduces out-of-pocket cost to the veteran, and can improve care coordination.”

It’s not clear why VA care is cheaper than community care, she said, “but it may be related to the [higher] patient volumes we see in our VA facilities.” Lower overhead costs and government pricing contracts for chemotherapies/injectables could also be factors, Clough explained. In an interview, Todd Wagner, PhD, Stanford University Professor in the Department of Surgery and Director of the Health Economics Research Center at the VA, said the analysis needs risk adjustment for cancer severity and other illnesses and comorbidities that could affect cancer treatment. “In our work, sicker veterans get care in VA, and healthier veterans are choosing VA-purchased care [in the community].”

He noted that in the new analysis, the VA care looks much cheaper. “I'm struggling with that result: It flies in the face of our past work,” he said. He added that an analysis should also look at surgery and radiation. “VA has a tradition of providing high-value medications at a lower cost. But VA’s costs of surgery and radiation tend to be more expensive.”

Clough does not plan more research in this area. For now, she said, her site is working to expand to include infusion clinics at local VA community-based outpatient clinics as part of the Close to Me program. The program, launched by the VA in 2022, aims to provide cancer services at community-based outpatient clinics, mobile infusion units, and patient homes.

“As part of this service, we are looking to maximize video-based and phone visits between our existing oncology staff and veterans living in more isolated areas, coordinate labs/imaging locally, and deliver infusion and/or injectable therapies to the veteran,” Clough said.

In addition, she said, “We currently have a dedicated hematology/oncology trained pharmacist and 2 infusion nurses working to expand the service and deliver veteran care in these remote areas.”

There was no funding for this study, and the authors have no disclosures. Wagner discloses grant funding to his institutions from the VA, the National Institutes of Health, the Agency for Healthcare Research and Quality, the Robert Wood Johnson Foundation, and the Heinz Foundation. 

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.
 

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.
 

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.