Key clinical point: Endocrine therapy (ET) did not have any detrimental effect on cognitive abilities in women aged ≥70 years with early breast cancer (BC).

Major finding: Patients receiving ET had a Mini-Mental State Examination (MMSE) score of 28.1, with mild and severe cognitive impairments observed in 25% and 2% of patients, respectively. The MSME score improved by 0.4 points (P = .013) after 15 months and by 0.5 points (P = .018) after 27 months in patients receiving ET.

Study details: Findings are from the observational CLIMB study including 273 women with stage I-III BC who were ≥70 years old, of which 48% received ET.

Disclosures: This study was funded by the KWF Dutch Cancer Society. The authors declared no conflicts of interest.

Source: Baltussen JC et al. Association between endocrine therapy and cognitive decline in older women with early breast cancer: Findings from the prospective CLIMB study. Eur J Cancer. 2023 (Feb 16). Doi: 10.1016/j.ejca.2023.02.008

Key clinical point: Endocrine therapy (ET) did not have any detrimental effect on cognitive abilities in women aged ≥70 years with early breast cancer (BC).

Major finding: Patients receiving ET had a Mini-Mental State Examination (MMSE) score of 28.1, with mild and severe cognitive impairments observed in 25% and 2% of patients, respectively. The MSME score improved by 0.4 points (P = .013) after 15 months and by 0.5 points (P = .018) after 27 months in patients receiving ET.

Study details: Findings are from the observational CLIMB study including 273 women with stage I-III BC who were ≥70 years old, of which 48% received ET.

Disclosures: This study was funded by the KWF Dutch Cancer Society. The authors declared no conflicts of interest.

Source: Baltussen JC et al. Association between endocrine therapy and cognitive decline in older women with early breast cancer: Findings from the prospective CLIMB study. Eur J Cancer. 2023 (Feb 16). Doi: 10.1016/j.ejca.2023.02.008

Key clinical point: Endocrine therapy (ET) did not have any detrimental effect on cognitive abilities in women aged ≥70 years with early breast cancer (BC).

Major finding: Patients receiving ET had a Mini-Mental State Examination (MMSE) score of 28.1, with mild and severe cognitive impairments observed in 25% and 2% of patients, respectively. The MSME score improved by 0.4 points (P = .013) after 15 months and by 0.5 points (P = .018) after 27 months in patients receiving ET.

Study details: Findings are from the observational CLIMB study including 273 women with stage I-III BC who were ≥70 years old, of which 48% received ET.

Disclosures: This study was funded by the KWF Dutch Cancer Society. The authors declared no conflicts of interest.

Source: Baltussen JC et al. Association between endocrine therapy and cognitive decline in older women with early breast cancer: Findings from the prospective CLIMB study. Eur J Cancer. 2023 (Feb 16). Doi: 10.1016/j.ejca.2023.02.008

Key clinical point: Patients with breast cancer (BC) should be recommended to undergo primary breast surgery within 8 weeks from BC diagnosis for best survival outcomes.

Major finding: Overall survival outcomes were worsened by ≥15% when the interval between BC diagnosis and surgery was ≥9 weeks compared with 0-4 weeks (hazard ratio at 9 weeks 1.15; P < .001).

Study details: Findings are from a case series study including 373,334 female patients with stage I-III BC who underwent primary breast surgery.

Disclosures: This study was supported by grants from the US National Cancer Institute and other sources. LG Wilke declared being the founder of and stock owner in Elucent Medical. BM Hanlon declared receiving grants from the US National Institutes of Health outside the submitted work.

Source: Wiener AA et al. Reexamining time from breast cancer diagnosis to primary breast surgery. JAMA Surg. 2023 (Mar 1). Doi: 10.1001/jamasurg.2022.8388

Key clinical point: Patients with breast cancer (BC) should be recommended to undergo primary breast surgery within 8 weeks from BC diagnosis for best survival outcomes.

Major finding: Overall survival outcomes were worsened by ≥15% when the interval between BC diagnosis and surgery was ≥9 weeks compared with 0-4 weeks (hazard ratio at 9 weeks 1.15; P < .001).

Study details: Findings are from a case series study including 373,334 female patients with stage I-III BC who underwent primary breast surgery.

Disclosures: This study was supported by grants from the US National Cancer Institute and other sources. LG Wilke declared being the founder of and stock owner in Elucent Medical. BM Hanlon declared receiving grants from the US National Institutes of Health outside the submitted work.

Source: Wiener AA et al. Reexamining time from breast cancer diagnosis to primary breast surgery. JAMA Surg. 2023 (Mar 1). Doi: 10.1001/jamasurg.2022.8388

Key clinical point: Patients with breast cancer (BC) should be recommended to undergo primary breast surgery within 8 weeks from BC diagnosis for best survival outcomes.

Major finding: Overall survival outcomes were worsened by ≥15% when the interval between BC diagnosis and surgery was ≥9 weeks compared with 0-4 weeks (hazard ratio at 9 weeks 1.15; P < .001).

Study details: Findings are from a case series study including 373,334 female patients with stage I-III BC who underwent primary breast surgery.

Disclosures: This study was supported by grants from the US National Cancer Institute and other sources. LG Wilke declared being the founder of and stock owner in Elucent Medical. BM Hanlon declared receiving grants from the US National Institutes of Health outside the submitted work.

Source: Wiener AA et al. Reexamining time from breast cancer diagnosis to primary breast surgery. JAMA Surg. 2023 (Mar 1). Doi: 10.1001/jamasurg.2022.8388

Key clinical point: Adjuvant treatment with paclitaxel and trastuzumab demonstrated very good long-term survival outcomes in patients with small, node-negative, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC).

Major finding: After a median follow-up of 10.8 years, only 31 invasive disease-free survival events occurred, of which six were locoregional ipsilateral recurrences, nine were new contralateral breast cancers, six were distant recurrences, and 10 were all-cause deaths. The 10-year invasive disease-free survival rate was >90% (91.3%; 95% CI 88.3%-94.4%).

Study details: Findings are from the phase 2 APT study including 406 patients with small (≤3 cm), node-negative, HER2+ BC who received adjuvant paclitaxel+trastuzumab for 12 weeks followed by trastuzumab for 40 weeks to complete a full year of trastuzumab treatment.

Disclosures: This study was funded by Genentech. The authors declared receiving consulting or advisory board fees, grant support, payment, or having other ties with several sources.

Source: Tolaney SM et al. Adjuvant paclitaxel and trastuzumab for node-negative, HER2-positive breast cancer: Final 10-year analysis of the open-label, single-arm, phase 2 APT trial. Lancet Oncol. 2023;24(3):273-285 (Feb 27). Doi: 10.1016/S1470-2045(23)00051-7

Key clinical point: Adjuvant treatment with paclitaxel and trastuzumab demonstrated very good long-term survival outcomes in patients with small, node-negative, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC).

Major finding: After a median follow-up of 10.8 years, only 31 invasive disease-free survival events occurred, of which six were locoregional ipsilateral recurrences, nine were new contralateral breast cancers, six were distant recurrences, and 10 were all-cause deaths. The 10-year invasive disease-free survival rate was >90% (91.3%; 95% CI 88.3%-94.4%).

Study details: Findings are from the phase 2 APT study including 406 patients with small (≤3 cm), node-negative, HER2+ BC who received adjuvant paclitaxel+trastuzumab for 12 weeks followed by trastuzumab for 40 weeks to complete a full year of trastuzumab treatment.

Disclosures: This study was funded by Genentech. The authors declared receiving consulting or advisory board fees, grant support, payment, or having other ties with several sources.

Source: Tolaney SM et al. Adjuvant paclitaxel and trastuzumab for node-negative, HER2-positive breast cancer: Final 10-year analysis of the open-label, single-arm, phase 2 APT trial. Lancet Oncol. 2023;24(3):273-285 (Feb 27). Doi: 10.1016/S1470-2045(23)00051-7

Key clinical point: Adjuvant treatment with paclitaxel and trastuzumab demonstrated very good long-term survival outcomes in patients with small, node-negative, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC).

Major finding: After a median follow-up of 10.8 years, only 31 invasive disease-free survival events occurred, of which six were locoregional ipsilateral recurrences, nine were new contralateral breast cancers, six were distant recurrences, and 10 were all-cause deaths. The 10-year invasive disease-free survival rate was >90% (91.3%; 95% CI 88.3%-94.4%).

Study details: Findings are from the phase 2 APT study including 406 patients with small (≤3 cm), node-negative, HER2+ BC who received adjuvant paclitaxel+trastuzumab for 12 weeks followed by trastuzumab for 40 weeks to complete a full year of trastuzumab treatment.

Disclosures: This study was funded by Genentech. The authors declared receiving consulting or advisory board fees, grant support, payment, or having other ties with several sources.

Source: Tolaney SM et al. Adjuvant paclitaxel and trastuzumab for node-negative, HER2-positive breast cancer: Final 10-year analysis of the open-label, single-arm, phase 2 APT trial. Lancet Oncol. 2023;24(3):273-285 (Feb 27). Doi: 10.1016/S1470-2045(23)00051-7

Key clinical point: Alisertib demonstrated clinically meaningful antitumor activity both with and without fulvestrant and a tolerable safety profile in patients with endocrine-resistant, human epidermal growth factor receptor 2-negative (ERBB2−) metastatic breast cancer (BC).

Major finding: The objective response rates were 19.6% (90% CI 10.6%-31.7%) and 20.0% (90% CI 10.9%-32.3%) for alisertib and alisertib+fulvestrant, respectively, and the median progression-free survival was approximately 5 months for both treatment arms. The most common grade ≥3 adverse events were neutropenia, leukopenia, and anemia.

Study details: Findings are from the phase 2 TBCRC041 trial including 91 patients with endocrine-resistant, ERBB2− metastatic BC who were previously treated with a cyclin-dependent kinase 4/6 inhibitor and were randomly assigned to receive alisertib alone or alisertib+fulvestrant.

Disclosures: This study was supported by Takeda Oncology. The authors declared receiving funding, fees, or research support or having other ties with several sources, including Takeda Oncology.

Source: Haddad TC et al. Evaluation of alisertib alone or combined with fulvestrant in patients with endocrine-resistant advanced breast cancer: The phase 2 TBCRC041 randomized clinical trial. JAMA Oncol. 2023 (Mar 9). Doi: 10.1001/jamaoncol.2022.7949

Key clinical point: Alisertib demonstrated clinically meaningful antitumor activity both with and without fulvestrant and a tolerable safety profile in patients with endocrine-resistant, human epidermal growth factor receptor 2-negative (ERBB2−) metastatic breast cancer (BC).

Major finding: The objective response rates were 19.6% (90% CI 10.6%-31.7%) and 20.0% (90% CI 10.9%-32.3%) for alisertib and alisertib+fulvestrant, respectively, and the median progression-free survival was approximately 5 months for both treatment arms. The most common grade ≥3 adverse events were neutropenia, leukopenia, and anemia.

Study details: Findings are from the phase 2 TBCRC041 trial including 91 patients with endocrine-resistant, ERBB2− metastatic BC who were previously treated with a cyclin-dependent kinase 4/6 inhibitor and were randomly assigned to receive alisertib alone or alisertib+fulvestrant.

Disclosures: This study was supported by Takeda Oncology. The authors declared receiving funding, fees, or research support or having other ties with several sources, including Takeda Oncology.

Source: Haddad TC et al. Evaluation of alisertib alone or combined with fulvestrant in patients with endocrine-resistant advanced breast cancer: The phase 2 TBCRC041 randomized clinical trial. JAMA Oncol. 2023 (Mar 9). Doi: 10.1001/jamaoncol.2022.7949

Key clinical point: Alisertib demonstrated clinically meaningful antitumor activity both with and without fulvestrant and a tolerable safety profile in patients with endocrine-resistant, human epidermal growth factor receptor 2-negative (ERBB2−) metastatic breast cancer (BC).

Major finding: The objective response rates were 19.6% (90% CI 10.6%-31.7%) and 20.0% (90% CI 10.9%-32.3%) for alisertib and alisertib+fulvestrant, respectively, and the median progression-free survival was approximately 5 months for both treatment arms. The most common grade ≥3 adverse events were neutropenia, leukopenia, and anemia.

Study details: Findings are from the phase 2 TBCRC041 trial including 91 patients with endocrine-resistant, ERBB2− metastatic BC who were previously treated with a cyclin-dependent kinase 4/6 inhibitor and were randomly assigned to receive alisertib alone or alisertib+fulvestrant.

Disclosures: This study was supported by Takeda Oncology. The authors declared receiving funding, fees, or research support or having other ties with several sources, including Takeda Oncology.

Source: Haddad TC et al. Evaluation of alisertib alone or combined with fulvestrant in patients with endocrine-resistant advanced breast cancer: The phase 2 TBCRC041 randomized clinical trial. JAMA Oncol. 2023 (Mar 9). Doi: 10.1001/jamaoncol.2022.7949

Key clinical point: The risk for non-breast second primary cancer (SPC) at many sites was significantly elevated in female breast cancer (BC) survivors, particularly those who were first diagnosed with BC before the age of 50 years.

Major finding: The summary standardized incidence ratio (SIR) for non-breast SPC was estimated to be 1.24 (95% CI 1.14-1.36), with the risk being significantly higher among patients diagnosed with BC before vs after the age of 50 years (SIR 1.59 vs 1.13; P < .001). The risk for non-breast SPC was the highest at the thyroid (SIR 1.89; 95% CI 1.49-2.38), followed by corpus uteri, ovary, kidney, esophagus, skin (melanoma), blood (leukemia), lung, stomach, and bladder.

Study details: Findings are from a meta-analysis of one prospective and 27 retrospective studies.

Disclosures: This study was funded by the CRUK Catalyst Award CanGene-CanVar, UK. The authors declared no conflicts of interest.

Source: Allen I et al. Risks of second non-breast primaries following breast cancer in women: A systematic review and meta-analysis. Breast Cancer Res. 2023;25(1):18 (Feb 10). Doi: 10.1186/s13058-023-01610-x

Key clinical point: The risk for non-breast second primary cancer (SPC) at many sites was significantly elevated in female breast cancer (BC) survivors, particularly those who were first diagnosed with BC before the age of 50 years.

Major finding: The summary standardized incidence ratio (SIR) for non-breast SPC was estimated to be 1.24 (95% CI 1.14-1.36), with the risk being significantly higher among patients diagnosed with BC before vs after the age of 50 years (SIR 1.59 vs 1.13; P < .001). The risk for non-breast SPC was the highest at the thyroid (SIR 1.89; 95% CI 1.49-2.38), followed by corpus uteri, ovary, kidney, esophagus, skin (melanoma), blood (leukemia), lung, stomach, and bladder.

Study details: Findings are from a meta-analysis of one prospective and 27 retrospective studies.

Disclosures: This study was funded by the CRUK Catalyst Award CanGene-CanVar, UK. The authors declared no conflicts of interest.

Source: Allen I et al. Risks of second non-breast primaries following breast cancer in women: A systematic review and meta-analysis. Breast Cancer Res. 2023;25(1):18 (Feb 10). Doi: 10.1186/s13058-023-01610-x

Key clinical point: The risk for non-breast second primary cancer (SPC) at many sites was significantly elevated in female breast cancer (BC) survivors, particularly those who were first diagnosed with BC before the age of 50 years.

Major finding: The summary standardized incidence ratio (SIR) for non-breast SPC was estimated to be 1.24 (95% CI 1.14-1.36), with the risk being significantly higher among patients diagnosed with BC before vs after the age of 50 years (SIR 1.59 vs 1.13; P < .001). The risk for non-breast SPC was the highest at the thyroid (SIR 1.89; 95% CI 1.49-2.38), followed by corpus uteri, ovary, kidney, esophagus, skin (melanoma), blood (leukemia), lung, stomach, and bladder.

Study details: Findings are from a meta-analysis of one prospective and 27 retrospective studies.

Disclosures: This study was funded by the CRUK Catalyst Award CanGene-CanVar, UK. The authors declared no conflicts of interest.

Source: Allen I et al. Risks of second non-breast primaries following breast cancer in women: A systematic review and meta-analysis. Breast Cancer Res. 2023;25(1):18 (Feb 10). Doi: 10.1186/s13058-023-01610-x

Endocrine therapy (ET) has long been the therapeutic backbone for the treatment of HR+/HER2- breast cancer. However, for patients who already have advanced HR+/HER2- disease at the time of diagnosis, studies have shown that addition of a CDK4/6 inhibitor significantly improves outcomes compared with ET alone.

In this ReCAP, Dr Kevin Kalinsky, director of the Glenn Family Breast Center at Winship Cancer Institute in Atlanta, Georgia, examines important considerations in the frontline treatment of HR+/HER2- advanced breast cancer.

First, he reviews the PALOMA-2 data, which looked at the overall survival of the CDK4/6 inhibitor palbociclib plus letrozole. He then compares that data with the overall survival data of other CDK4/5 inhibitors.

Dr Kalinsky then examines the findings of MONALEESA-7, which looked at premenopausal patients with HR+/HER2- advanced breast cancer treated with ET plus or minus ribociclib. In that study population, the combination of ET and ribociclib showed an overall survival advantage.

Finally, he discusses data from the Right Choice trial, which found that patients did better when given hormonal therapy plus a CDK4/6 inhibitor as opposed to doublet chemotherapy.

--

Kevin Kalinsky, MD, Director, Glenn Family Breast Center, Winship Cancer Institute, Atlanta, Georgia

Kevin Kalinsky, MD, has disclosed the following relevant financial relationships:

Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Pfizer; Eli Lilly; Novartis ; Eisai; AstraZeneca; Daiichi Sankyo; Puma; 4D Pharma; Oncosec; Immunomedics; Merck; Seattle Genetics

Spouse holds stock in: Grail; Array Biopharma; Pfizer (prior employee)

Endocrine therapy (ET) has long been the therapeutic backbone for the treatment of HR+/HER2- breast cancer. However, for patients who already have advanced HR+/HER2- disease at the time of diagnosis, studies have shown that addition of a CDK4/6 inhibitor significantly improves outcomes compared with ET alone.

In this ReCAP, Dr Kevin Kalinsky, director of the Glenn Family Breast Center at Winship Cancer Institute in Atlanta, Georgia, examines important considerations in the frontline treatment of HR+/HER2- advanced breast cancer.

First, he reviews the PALOMA-2 data, which looked at the overall survival of the CDK4/6 inhibitor palbociclib plus letrozole. He then compares that data with the overall survival data of other CDK4/5 inhibitors.

Dr Kalinsky then examines the findings of MONALEESA-7, which looked at premenopausal patients with HR+/HER2- advanced breast cancer treated with ET plus or minus ribociclib. In that study population, the combination of ET and ribociclib showed an overall survival advantage.

Finally, he discusses data from the Right Choice trial, which found that patients did better when given hormonal therapy plus a CDK4/6 inhibitor as opposed to doublet chemotherapy.

--

Kevin Kalinsky, MD, Director, Glenn Family Breast Center, Winship Cancer Institute, Atlanta, Georgia

Kevin Kalinsky, MD, has disclosed the following relevant financial relationships:

Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Pfizer; Eli Lilly; Novartis ; Eisai; AstraZeneca; Daiichi Sankyo; Puma; 4D Pharma; Oncosec; Immunomedics; Merck; Seattle Genetics

Spouse holds stock in: Grail; Array Biopharma; Pfizer (prior employee)

Endocrine therapy (ET) has long been the therapeutic backbone for the treatment of HR+/HER2- breast cancer. However, for patients who already have advanced HR+/HER2- disease at the time of diagnosis, studies have shown that addition of a CDK4/6 inhibitor significantly improves outcomes compared with ET alone.

In this ReCAP, Dr Kevin Kalinsky, director of the Glenn Family Breast Center at Winship Cancer Institute in Atlanta, Georgia, examines important considerations in the frontline treatment of HR+/HER2- advanced breast cancer.

First, he reviews the PALOMA-2 data, which looked at the overall survival of the CDK4/6 inhibitor palbociclib plus letrozole. He then compares that data with the overall survival data of other CDK4/5 inhibitors.

Dr Kalinsky then examines the findings of MONALEESA-7, which looked at premenopausal patients with HR+/HER2- advanced breast cancer treated with ET plus or minus ribociclib. In that study population, the combination of ET and ribociclib showed an overall survival advantage.

Finally, he discusses data from the Right Choice trial, which found that patients did better when given hormonal therapy plus a CDK4/6 inhibitor as opposed to doublet chemotherapy.

--

Kevin Kalinsky, MD, Director, Glenn Family Breast Center, Winship Cancer Institute, Atlanta, Georgia

Kevin Kalinsky, MD, has disclosed the following relevant financial relationships:

Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for: Pfizer; Eli Lilly; Novartis ; Eisai; AstraZeneca; Daiichi Sankyo; Puma; 4D Pharma; Oncosec; Immunomedics; Merck; Seattle Genetics

Spouse holds stock in: Grail; Array Biopharma; Pfizer (prior employee)

Key clinical point: Patients with estrogen receptor-negative (ER−) primary breast cancer (BC) have a higher risk of developing secondary BC during the first 5 years after treatment than patients with ER-positive (ER+) primary BC.

Major finding: In women with ER− vs ER+ primary BC, the rates of secondary BCs were higher during the first 5 years of follow-up (16.0/1000 person-years [PY]; 95% CI 14.2-17.9/1000 PY vs 7.8/1000 PY; 95% CI 7.3-8.4/1000 PY) but were similar after 5 years (12.1/1000 PY; 95% CI 9.9-14.7/1000 PY vs 9.3/1000 PY; 95% CI 8.4-10.3/1000 PY).

Study details: Findings are from a study including 36,165 women with stage I-III primary BC who underwent breast‐conserving surgery or mastectomy.

Disclosures: This study was funded by the US National Cancer Institute. Some authors declared receiving grants, personal fees, payments, or travel support from several sources.

Source: Lowry KP et al. Variation in second breast cancer risk after primary invasive cancer by time since primary cancer diagnosis and estrogen receptor status. Cancer. 2023 (Feb 15). Doi: 10.1002/cncr.34679

Key clinical point: Patients with estrogen receptor-negative (ER−) primary breast cancer (BC) have a higher risk of developing secondary BC during the first 5 years after treatment than patients with ER-positive (ER+) primary BC.

Major finding: In women with ER− vs ER+ primary BC, the rates of secondary BCs were higher during the first 5 years of follow-up (16.0/1000 person-years [PY]; 95% CI 14.2-17.9/1000 PY vs 7.8/1000 PY; 95% CI 7.3-8.4/1000 PY) but were similar after 5 years (12.1/1000 PY; 95% CI 9.9-14.7/1000 PY vs 9.3/1000 PY; 95% CI 8.4-10.3/1000 PY).

Study details: Findings are from a study including 36,165 women with stage I-III primary BC who underwent breast‐conserving surgery or mastectomy.

Disclosures: This study was funded by the US National Cancer Institute. Some authors declared receiving grants, personal fees, payments, or travel support from several sources.

Source: Lowry KP et al. Variation in second breast cancer risk after primary invasive cancer by time since primary cancer diagnosis and estrogen receptor status. Cancer. 2023 (Feb 15). Doi: 10.1002/cncr.34679

Key clinical point: Patients with estrogen receptor-negative (ER−) primary breast cancer (BC) have a higher risk of developing secondary BC during the first 5 years after treatment than patients with ER-positive (ER+) primary BC.

Major finding: In women with ER− vs ER+ primary BC, the rates of secondary BCs were higher during the first 5 years of follow-up (16.0/1000 person-years [PY]; 95% CI 14.2-17.9/1000 PY vs 7.8/1000 PY; 95% CI 7.3-8.4/1000 PY) but were similar after 5 years (12.1/1000 PY; 95% CI 9.9-14.7/1000 PY vs 9.3/1000 PY; 95% CI 8.4-10.3/1000 PY).

Study details: Findings are from a study including 36,165 women with stage I-III primary BC who underwent breast‐conserving surgery or mastectomy.

Disclosures: This study was funded by the US National Cancer Institute. Some authors declared receiving grants, personal fees, payments, or travel support from several sources.

Source: Lowry KP et al. Variation in second breast cancer risk after primary invasive cancer by time since primary cancer diagnosis and estrogen receptor status. Cancer. 2023 (Feb 15). Doi: 10.1002/cncr.34679

Key clinical point: Cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors plus endocrine therapy (ET) led to a significantly higher improvement in overall survival than ET alone in older patients with hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2−) metastatic breast cancer (BC).

Major finding: ET+CDK4/6 inhibitor vs ET alone reduced mortality rate by 41% in the first-line treatment setting (adjusted hazard ratio [aHR] 0.590; 95% CI 0.423-0.823) and by 58% in the second-line setting (aHR 0.422; 95% CI 0.238-0.746).

Study details: This retrospective cohort study included 630 female patients aged ≥65 years with HR+/HER2− metastatic BC from the Survey Epidemiology and End Results (SEER)‐Medicare database, of which 461 and 169 patients received first‐line treatment with ET alone and ET+CDK4/6 inhibitor, respectively.

Disclosures: The acquisition of SEER‐Medicare data was supported by the University of Houston,  Texas,College of Pharmacy. The authors declared no conflicts of interest.

Source: Goyal RK et al. Overall survival associated with CDK4/6 inhibitors in patients with HR+/HER2− metastatic breast cancer in the United States: A SEER-Medicare population-based study. Cancer. 2023;129(7):1051-1063 (Feb 9). Doi: 10.1002/cncr.34675

Key clinical point: Cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors plus endocrine therapy (ET) led to a significantly higher improvement in overall survival than ET alone in older patients with hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2−) metastatic breast cancer (BC).

Major finding: ET+CDK4/6 inhibitor vs ET alone reduced mortality rate by 41% in the first-line treatment setting (adjusted hazard ratio [aHR] 0.590; 95% CI 0.423-0.823) and by 58% in the second-line setting (aHR 0.422; 95% CI 0.238-0.746).

Study details: This retrospective cohort study included 630 female patients aged ≥65 years with HR+/HER2− metastatic BC from the Survey Epidemiology and End Results (SEER)‐Medicare database, of which 461 and 169 patients received first‐line treatment with ET alone and ET+CDK4/6 inhibitor, respectively.

Disclosures: The acquisition of SEER‐Medicare data was supported by the University of Houston,  Texas,College of Pharmacy. The authors declared no conflicts of interest.

Source: Goyal RK et al. Overall survival associated with CDK4/6 inhibitors in patients with HR+/HER2− metastatic breast cancer in the United States: A SEER-Medicare population-based study. Cancer. 2023;129(7):1051-1063 (Feb 9). Doi: 10.1002/cncr.34675

Key clinical point: Cyclin-dependent kinase 4 and 6 (CDK4/6) inhibitors plus endocrine therapy (ET) led to a significantly higher improvement in overall survival than ET alone in older patients with hormone receptor-positive (HR+) and human epidermal growth factor receptor 2-negative (HER2−) metastatic breast cancer (BC).

Major finding: ET+CDK4/6 inhibitor vs ET alone reduced mortality rate by 41% in the first-line treatment setting (adjusted hazard ratio [aHR] 0.590; 95% CI 0.423-0.823) and by 58% in the second-line setting (aHR 0.422; 95% CI 0.238-0.746).

Study details: This retrospective cohort study included 630 female patients aged ≥65 years with HR+/HER2− metastatic BC from the Survey Epidemiology and End Results (SEER)‐Medicare database, of which 461 and 169 patients received first‐line treatment with ET alone and ET+CDK4/6 inhibitor, respectively.

Disclosures: The acquisition of SEER‐Medicare data was supported by the University of Houston,  Texas,College of Pharmacy. The authors declared no conflicts of interest.

Source: Goyal RK et al. Overall survival associated with CDK4/6 inhibitors in patients with HR+/HER2− metastatic breast cancer in the United States: A SEER-Medicare population-based study. Cancer. 2023;129(7):1051-1063 (Feb 9). Doi: 10.1002/cncr.34675

Key clinical point: The rate of pathological complete response (pCR) was significantly higher in patients with early-stage breast cancer (BC) who received neoadjuvant treatment with pegylated liposomal doxorubicin-cyclophosphamide followed by docetaxel (LC-T) vs epirubicin-cyclophosphamide followed by docetaxel (EC-T).

Major finding: The pCR rate was significantly higher with LC-T vs EC-T in the overall cohort (25.3% vs 15.5%; P = .026) and in the subgroup of patients with triple-negative BC (47.1% vs 15.4%; P = .013).

Study details: Findings are from a retrospective study including 359 patients with stage I-III BC who received neoadjuvant treatment with LC-T (n = 178) or EC-T (n = 181) followed by surgery.

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

Source: Tsai J-H et al. Neoadjuvant pegylated liposomal doxorubicin- and epirubicin-based combination therapy regimens for early breast cancer: A multicenter retrospective case-control study. Breast Cancer Res Treat. 2023 (Mar 4). Doi: 10.1007/s10549-023-06867-6

Key clinical point: The rate of pathological complete response (pCR) was significantly higher in patients with early-stage breast cancer (BC) who received neoadjuvant treatment with pegylated liposomal doxorubicin-cyclophosphamide followed by docetaxel (LC-T) vs epirubicin-cyclophosphamide followed by docetaxel (EC-T).

Major finding: The pCR rate was significantly higher with LC-T vs EC-T in the overall cohort (25.3% vs 15.5%; P = .026) and in the subgroup of patients with triple-negative BC (47.1% vs 15.4%; P = .013).

Study details: Findings are from a retrospective study including 359 patients with stage I-III BC who received neoadjuvant treatment with LC-T (n = 178) or EC-T (n = 181) followed by surgery.

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

Source: Tsai J-H et al. Neoadjuvant pegylated liposomal doxorubicin- and epirubicin-based combination therapy regimens for early breast cancer: A multicenter retrospective case-control study. Breast Cancer Res Treat. 2023 (Mar 4). Doi: 10.1007/s10549-023-06867-6

Key clinical point: The rate of pathological complete response (pCR) was significantly higher in patients with early-stage breast cancer (BC) who received neoadjuvant treatment with pegylated liposomal doxorubicin-cyclophosphamide followed by docetaxel (LC-T) vs epirubicin-cyclophosphamide followed by docetaxel (EC-T).

Major finding: The pCR rate was significantly higher with LC-T vs EC-T in the overall cohort (25.3% vs 15.5%; P = .026) and in the subgroup of patients with triple-negative BC (47.1% vs 15.4%; P = .013).

Study details: Findings are from a retrospective study including 359 patients with stage I-III BC who received neoadjuvant treatment with LC-T (n = 178) or EC-T (n = 181) followed by surgery.

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

Source: Tsai J-H et al. Neoadjuvant pegylated liposomal doxorubicin- and epirubicin-based combination therapy regimens for early breast cancer: A multicenter retrospective case-control study. Breast Cancer Res Treat. 2023 (Mar 4). Doi: 10.1007/s10549-023-06867-6

Key clinical point: Contrary to women who received bilateral oophorectomy, women who underwent hysterectomy and concurrent estrogen plus progestin therapy had a significantly higher risk of developing breast cancer (BC).

Major finding: Bilateral oophorectomy (hazard ratio [HR] 0.91; 95% CI 0.83-1.00) did not increase the risk for BC irrespective of the use of hormone therapy. However, hysterectomy alone was positively associated with an increased risk for BC (HR 1.12; 95% CI 1.02-1.23), especially among those receiving estrogen plus progestin therapy (HR 1.25; 95% CI 1.01-1.55).

Study details: Findings are from a prospective cohort study, The Sister Study, including 50,701 women without BC who had a biological sister with BC, of which 13.8% and 18.1% of participants underwent hysterectomy only and bilateral oophorectomy with or without hysterectomy, respectively.

Disclosures: This study was funded by the Intramural Research Program at the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Lovett SM et al. Hysterectomy, bilateral oophorectomy, and breast cancer risk in a racially diverse prospective cohort study. J Natl Cancer Inst. 2023 (Feb 20). Doi: 10.1093/jnci/djad038

Key clinical point: Contrary to women who received bilateral oophorectomy, women who underwent hysterectomy and concurrent estrogen plus progestin therapy had a significantly higher risk of developing breast cancer (BC).

Major finding: Bilateral oophorectomy (hazard ratio [HR] 0.91; 95% CI 0.83-1.00) did not increase the risk for BC irrespective of the use of hormone therapy. However, hysterectomy alone was positively associated with an increased risk for BC (HR 1.12; 95% CI 1.02-1.23), especially among those receiving estrogen plus progestin therapy (HR 1.25; 95% CI 1.01-1.55).

Study details: Findings are from a prospective cohort study, The Sister Study, including 50,701 women without BC who had a biological sister with BC, of which 13.8% and 18.1% of participants underwent hysterectomy only and bilateral oophorectomy with or without hysterectomy, respectively.

Disclosures: This study was funded by the Intramural Research Program at the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Lovett SM et al. Hysterectomy, bilateral oophorectomy, and breast cancer risk in a racially diverse prospective cohort study. J Natl Cancer Inst. 2023 (Feb 20). Doi: 10.1093/jnci/djad038

Key clinical point: Contrary to women who received bilateral oophorectomy, women who underwent hysterectomy and concurrent estrogen plus progestin therapy had a significantly higher risk of developing breast cancer (BC).

Major finding: Bilateral oophorectomy (hazard ratio [HR] 0.91; 95% CI 0.83-1.00) did not increase the risk for BC irrespective of the use of hormone therapy. However, hysterectomy alone was positively associated with an increased risk for BC (HR 1.12; 95% CI 1.02-1.23), especially among those receiving estrogen plus progestin therapy (HR 1.25; 95% CI 1.01-1.55).

Study details: Findings are from a prospective cohort study, The Sister Study, including 50,701 women without BC who had a biological sister with BC, of which 13.8% and 18.1% of participants underwent hysterectomy only and bilateral oophorectomy with or without hysterectomy, respectively.

Disclosures: This study was funded by the Intramural Research Program at the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Lovett SM et al. Hysterectomy, bilateral oophorectomy, and breast cancer risk in a racially diverse prospective cohort study. J Natl Cancer Inst. 2023 (Feb 20). Doi: 10.1093/jnci/djad038