Clinical Edge Journal Scan

Key clinical point: Preterm birth was positively associated with the risk for incident premenopausal breast cancer (BC) in women aged <55 years who experienced preeclampsia or gestational hypertension.

Major finding: Overall, a history of preterm birth was not associated with the risk for premenopausal BC (hazard ratio [HR] 1.02; 95% CI 0.92-1.14). However, it was positively associated with the risk for premenopausal BC in women who had preeclampsia or gestational hypertension (HR 1.52; 95% CI 1.06-2.18). Preeclampsia on the other hand was inversely associated with premenopausal BC risk (HR 0.86; 95% CI 0.75-0.99).

Study details: Findings are from an analysis of six cohort studies including 184,866 premenopausal women aged <55 years, of which 3096 women were diagnosed with premenopausal BC.

Disclosures: This study was supported by the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Nichols HB et al. Hypertensive conditions of pregnancy, preterm birth, and premenopausal breast cancer risk: A premenopausal breast cancer collaborative group analysis. Breast Cancer Res Treat. 2023 (Apr 5). Doi: 10.1007/s10549-023-06903-5

Key clinical point: Preterm birth was positively associated with the risk for incident premenopausal breast cancer (BC) in women aged <55 years who experienced preeclampsia or gestational hypertension.

Major finding: Overall, a history of preterm birth was not associated with the risk for premenopausal BC (hazard ratio [HR] 1.02; 95% CI 0.92-1.14). However, it was positively associated with the risk for premenopausal BC in women who had preeclampsia or gestational hypertension (HR 1.52; 95% CI 1.06-2.18). Preeclampsia on the other hand was inversely associated with premenopausal BC risk (HR 0.86; 95% CI 0.75-0.99).

Study details: Findings are from an analysis of six cohort studies including 184,866 premenopausal women aged <55 years, of which 3096 women were diagnosed with premenopausal BC.

Disclosures: This study was supported by the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Nichols HB et al. Hypertensive conditions of pregnancy, preterm birth, and premenopausal breast cancer risk: A premenopausal breast cancer collaborative group analysis. Breast Cancer Res Treat. 2023 (Apr 5). Doi: 10.1007/s10549-023-06903-5

Key clinical point: Preterm birth was positively associated with the risk for incident premenopausal breast cancer (BC) in women aged <55 years who experienced preeclampsia or gestational hypertension.

Major finding: Overall, a history of preterm birth was not associated with the risk for premenopausal BC (hazard ratio [HR] 1.02; 95% CI 0.92-1.14). However, it was positively associated with the risk for premenopausal BC in women who had preeclampsia or gestational hypertension (HR 1.52; 95% CI 1.06-2.18). Preeclampsia on the other hand was inversely associated with premenopausal BC risk (HR 0.86; 95% CI 0.75-0.99).

Study details: Findings are from an analysis of six cohort studies including 184,866 premenopausal women aged <55 years, of which 3096 women were diagnosed with premenopausal BC.

Disclosures: This study was supported by the US National Institutes of Health and other sources. The authors declared no conflicts of interest.

Source: Nichols HB et al. Hypertensive conditions of pregnancy, preterm birth, and premenopausal breast cancer risk: A premenopausal breast cancer collaborative group analysis. Breast Cancer Res Treat. 2023 (Apr 5). Doi: 10.1007/s10549-023-06903-5

Key clinical point: Sonography features, such as spiculated morphology and antiparallel orientation, were significantly associated with worsened survival outcomes in patients with primary breast cancer (BC; tumor size <20 mm).

Major finding: The presence of spiculated morphology and antiparallel orientation on ultrasound was a significant risk factor for poor breast cancer-specific survival (hazard ratio [HR] 7.45; P < .001) and disease-free survival (HR 6.42; P < .001), with age ≥55 years (P < .05) and positive lymph node metastases (P < .001) also being associated with worse prognosis.

Study details: Findings are from a retrospective study including 790 women with small primary BC (tumor size <20 mm).

Disclosures: This study was supported by the National Natural Science Foundation of China and other sources. The authors declared no conflicts of interest.

Source: Shao S et al. Ultrasound features for prediction of long-term outcomes of women with primary breast cancer <20 mm. Front Oncol. 2023;13:1103397 (Mar 16). Doi: 10.3389/fonc.2023.1103397

Key clinical point: Sonography features, such as spiculated morphology and antiparallel orientation, were significantly associated with worsened survival outcomes in patients with primary breast cancer (BC; tumor size <20 mm).

Major finding: The presence of spiculated morphology and antiparallel orientation on ultrasound was a significant risk factor for poor breast cancer-specific survival (hazard ratio [HR] 7.45; P < .001) and disease-free survival (HR 6.42; P < .001), with age ≥55 years (P < .05) and positive lymph node metastases (P < .001) also being associated with worse prognosis.

Study details: Findings are from a retrospective study including 790 women with small primary BC (tumor size <20 mm).

Disclosures: This study was supported by the National Natural Science Foundation of China and other sources. The authors declared no conflicts of interest.

Source: Shao S et al. Ultrasound features for prediction of long-term outcomes of women with primary breast cancer <20 mm. Front Oncol. 2023;13:1103397 (Mar 16). Doi: 10.3389/fonc.2023.1103397

Key clinical point: Sonography features, such as spiculated morphology and antiparallel orientation, were significantly associated with worsened survival outcomes in patients with primary breast cancer (BC; tumor size <20 mm).

Major finding: The presence of spiculated morphology and antiparallel orientation on ultrasound was a significant risk factor for poor breast cancer-specific survival (hazard ratio [HR] 7.45; P < .001) and disease-free survival (HR 6.42; P < .001), with age ≥55 years (P < .05) and positive lymph node metastases (P < .001) also being associated with worse prognosis.

Study details: Findings are from a retrospective study including 790 women with small primary BC (tumor size <20 mm).

Disclosures: This study was supported by the National Natural Science Foundation of China and other sources. The authors declared no conflicts of interest.

Source: Shao S et al. Ultrasound features for prediction of long-term outcomes of women with primary breast cancer <20 mm. Front Oncol. 2023;13:1103397 (Mar 16). Doi: 10.3389/fonc.2023.1103397

Key clinical point: Breast-conserving surgery without axillary lymph node dissection as well as breast and axillary radiotherapy (BCSNR) was safe and resulted in survival rates comparable to mastectomy plus axillary lymph node dissection (MALND) in elderly patients with axillary lymph node-negative breast cancer (BC).

Major finding: At a median follow-up of 5 years, BCSNR vs MALND was not associated with significantly worsened distant recurrence-free survival (98.1% vs 93.2%; P  =  .990) and BC-specific survival (96.3% vs 99.3%; P  =  .076) rates but was associated with a significantly higher local recurrence rate (10.3% vs 2.2%; P  =  .001).

Study details: Findings are from a retrospective study including 541 patients aged ≥70 years with axillary lymph node-negative BC, of which 181 and 360 patients underwent MALND with negative axillary cleaning and BCSNR, respectively.

Disclosures: This study was supported by the CAMS Innovation Fund for Medical Sciences, China, and other sources. The authors declared no conflicts of interest.

Source: Zhong Y et al. Breast-conserving surgery without axillary surgery and radiation versus mastectomy plus axillary dissection in elderly breast cancer patients: A retrospective study. Front Oncol. 2023;13:1126104 (Mar 20). Doi: 10.3389/fonc.2023.1126104

Key clinical point: Breast-conserving surgery without axillary lymph node dissection as well as breast and axillary radiotherapy (BCSNR) was safe and resulted in survival rates comparable to mastectomy plus axillary lymph node dissection (MALND) in elderly patients with axillary lymph node-negative breast cancer (BC).

Major finding: At a median follow-up of 5 years, BCSNR vs MALND was not associated with significantly worsened distant recurrence-free survival (98.1% vs 93.2%; P  =  .990) and BC-specific survival (96.3% vs 99.3%; P  =  .076) rates but was associated with a significantly higher local recurrence rate (10.3% vs 2.2%; P  =  .001).

Study details: Findings are from a retrospective study including 541 patients aged ≥70 years with axillary lymph node-negative BC, of which 181 and 360 patients underwent MALND with negative axillary cleaning and BCSNR, respectively.

Disclosures: This study was supported by the CAMS Innovation Fund for Medical Sciences, China, and other sources. The authors declared no conflicts of interest.

Source: Zhong Y et al. Breast-conserving surgery without axillary surgery and radiation versus mastectomy plus axillary dissection in elderly breast cancer patients: A retrospective study. Front Oncol. 2023;13:1126104 (Mar 20). Doi: 10.3389/fonc.2023.1126104

Key clinical point: Breast-conserving surgery without axillary lymph node dissection as well as breast and axillary radiotherapy (BCSNR) was safe and resulted in survival rates comparable to mastectomy plus axillary lymph node dissection (MALND) in elderly patients with axillary lymph node-negative breast cancer (BC).

Major finding: At a median follow-up of 5 years, BCSNR vs MALND was not associated with significantly worsened distant recurrence-free survival (98.1% vs 93.2%; P  =  .990) and BC-specific survival (96.3% vs 99.3%; P  =  .076) rates but was associated with a significantly higher local recurrence rate (10.3% vs 2.2%; P  =  .001).

Study details: Findings are from a retrospective study including 541 patients aged ≥70 years with axillary lymph node-negative BC, of which 181 and 360 patients underwent MALND with negative axillary cleaning and BCSNR, respectively.

Disclosures: This study was supported by the CAMS Innovation Fund for Medical Sciences, China, and other sources. The authors declared no conflicts of interest.

Source: Zhong Y et al. Breast-conserving surgery without axillary surgery and radiation versus mastectomy plus axillary dissection in elderly breast cancer patients: A retrospective study. Front Oncol. 2023;13:1126104 (Mar 20). Doi: 10.3389/fonc.2023.1126104

Key clinical point: Serum thymidine kinase 1 activity (sTKa) proved to be an excellent biomarker of progression risk in patients with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2–) advanced breast cancer (BC) receiving first-line ribociclib+letrozole.

Major finding: Disease progression risk was significantly higher in patients with high vs low sTKa levels at baseline (hazard ratio 2.21; P  =  .0002). Patients with high sTKa levels on day 1 of cycle 2 after initial decrease on day 15 of cycle 1 (C1D15; hazard ratio 2.89; P  =  .0006) or on C1D15 (hazard ratio 5.65; P < .0001) had worse prognosis than those with low sTKa levels at all time points.

Study details: This phase 3 BioItaLEE study included 287 postmenopausal women with HR+/HER2– advanced BC who received ribociclib+letrozole as first-line therapy.

Disclosures: This study was supported by Novartis Farma SpA, Italy. Some authors declared participating on advisory boards and receiving grants, fees, honoraria, or travel support from several sources, including Novartis.

Source: Malorni L et al. Serum thymidine kinase activity in patients with HR-positive/HER2-negative advanced breast cancer treated with ribociclib plus letrozole: Results from the prospective BioItaLEE trial. Eur J Cancer. 2023;186:1-11 (Mar 7). Doi: 10.1016/j.ejca.2023.03.001

Key clinical point: Serum thymidine kinase 1 activity (sTKa) proved to be an excellent biomarker of progression risk in patients with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2–) advanced breast cancer (BC) receiving first-line ribociclib+letrozole.

Major finding: Disease progression risk was significantly higher in patients with high vs low sTKa levels at baseline (hazard ratio 2.21; P  =  .0002). Patients with high sTKa levels on day 1 of cycle 2 after initial decrease on day 15 of cycle 1 (C1D15; hazard ratio 2.89; P  =  .0006) or on C1D15 (hazard ratio 5.65; P < .0001) had worse prognosis than those with low sTKa levels at all time points.

Study details: This phase 3 BioItaLEE study included 287 postmenopausal women with HR+/HER2– advanced BC who received ribociclib+letrozole as first-line therapy.

Disclosures: This study was supported by Novartis Farma SpA, Italy. Some authors declared participating on advisory boards and receiving grants, fees, honoraria, or travel support from several sources, including Novartis.

Source: Malorni L et al. Serum thymidine kinase activity in patients with HR-positive/HER2-negative advanced breast cancer treated with ribociclib plus letrozole: Results from the prospective BioItaLEE trial. Eur J Cancer. 2023;186:1-11 (Mar 7). Doi: 10.1016/j.ejca.2023.03.001

Key clinical point: Serum thymidine kinase 1 activity (sTKa) proved to be an excellent biomarker of progression risk in patients with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2–) advanced breast cancer (BC) receiving first-line ribociclib+letrozole.

Major finding: Disease progression risk was significantly higher in patients with high vs low sTKa levels at baseline (hazard ratio 2.21; P  =  .0002). Patients with high sTKa levels on day 1 of cycle 2 after initial decrease on day 15 of cycle 1 (C1D15; hazard ratio 2.89; P  =  .0006) or on C1D15 (hazard ratio 5.65; P < .0001) had worse prognosis than those with low sTKa levels at all time points.

Study details: This phase 3 BioItaLEE study included 287 postmenopausal women with HR+/HER2– advanced BC who received ribociclib+letrozole as first-line therapy.

Disclosures: This study was supported by Novartis Farma SpA, Italy. Some authors declared participating on advisory boards and receiving grants, fees, honoraria, or travel support from several sources, including Novartis.

Source: Malorni L et al. Serum thymidine kinase activity in patients with HR-positive/HER2-negative advanced breast cancer treated with ribociclib plus letrozole: Results from the prospective BioItaLEE trial. Eur J Cancer. 2023;186:1-11 (Mar 7). Doi: 10.1016/j.ejca.2023.03.001

Key clinical point: In a pre-cyclin-dependent kinase 4 and 6 inhibitors era, patients with hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2−) breast cancer (BC) who had BRCA1/2 germline mutation (gBRCAm) vs wild type (gBRCAwt) had worse survival outcomes, especially those who received first-line endocrine therapy (ET).

Major finding: Compared with gBRCAwt carriers, gBRCAm carriers had shorter overall survival (OS; adjusted hazard ratio [aHR] 1.26; P  =  .024) and progression-free survival (PFS; aHR 1.21; P  =  .017), with both OS (aHR 1.54; P  =  .037) and PFS (aHR 1.58; P  =  .003) being further attenuated in patients receiving first-line ET.

Study details: Findings are from a study including 13,776 patients with metastatic BC from the ESME (Épidémio-Stratégie Médico-Economique) metastatic BC database, of which 676 and 170 patients were gBRCAwt and gBRCAm carriers, respectively.

Disclosures: The ESME metastatic BC database received financial support from various sources. Some authors declared receiving grants, personal fees, or non-financial support, or having other ties with several sources.

Source: Frenel JS et al. Efficacy of front-line treatment for hormone receptor-positive HER2-negative metastatic breast cancer with germline BRCA1/2 mutation. Br J Cancer. 2023 (Apr 3). Doi: 10.1038/s41416-023-02248-4

Key clinical point: In a pre-cyclin-dependent kinase 4 and 6 inhibitors era, patients with hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2−) breast cancer (BC) who had BRCA1/2 germline mutation (gBRCAm) vs wild type (gBRCAwt) had worse survival outcomes, especially those who received first-line endocrine therapy (ET).

Major finding: Compared with gBRCAwt carriers, gBRCAm carriers had shorter overall survival (OS; adjusted hazard ratio [aHR] 1.26; P  =  .024) and progression-free survival (PFS; aHR 1.21; P  =  .017), with both OS (aHR 1.54; P  =  .037) and PFS (aHR 1.58; P  =  .003) being further attenuated in patients receiving first-line ET.

Study details: Findings are from a study including 13,776 patients with metastatic BC from the ESME (Épidémio-Stratégie Médico-Economique) metastatic BC database, of which 676 and 170 patients were gBRCAwt and gBRCAm carriers, respectively.

Disclosures: The ESME metastatic BC database received financial support from various sources. Some authors declared receiving grants, personal fees, or non-financial support, or having other ties with several sources.

Source: Frenel JS et al. Efficacy of front-line treatment for hormone receptor-positive HER2-negative metastatic breast cancer with germline BRCA1/2 mutation. Br J Cancer. 2023 (Apr 3). Doi: 10.1038/s41416-023-02248-4

Key clinical point: In a pre-cyclin-dependent kinase 4 and 6 inhibitors era, patients with hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2−) breast cancer (BC) who had BRCA1/2 germline mutation (gBRCAm) vs wild type (gBRCAwt) had worse survival outcomes, especially those who received first-line endocrine therapy (ET).

Major finding: Compared with gBRCAwt carriers, gBRCAm carriers had shorter overall survival (OS; adjusted hazard ratio [aHR] 1.26; P  =  .024) and progression-free survival (PFS; aHR 1.21; P  =  .017), with both OS (aHR 1.54; P  =  .037) and PFS (aHR 1.58; P  =  .003) being further attenuated in patients receiving first-line ET.

Study details: Findings are from a study including 13,776 patients with metastatic BC from the ESME (Épidémio-Stratégie Médico-Economique) metastatic BC database, of which 676 and 170 patients were gBRCAwt and gBRCAm carriers, respectively.

Disclosures: The ESME metastatic BC database received financial support from various sources. Some authors declared receiving grants, personal fees, or non-financial support, or having other ties with several sources.

Source: Frenel JS et al. Efficacy of front-line treatment for hormone receptor-positive HER2-negative metastatic breast cancer with germline BRCA1/2 mutation. Br J Cancer. 2023 (Apr 3). Doi: 10.1038/s41416-023-02248-4

Key clinical point: In women with noninvasive neoplasia of the breast, treatment with low-dose tamoxifen for 3 years continued to prevent breast cancer (BC) recurrence, with an optimal safety profile, for at least 7 years after treatment cessation.

Major finding: After a median follow-up of 9.7 years, fewer cases of both invasive and in-situ BC (hazard ratio [HR] 0.58; log-rank P  =  .03) and contralateral BC (HR 0.36; P  =  .025) were reported in the tamoxifen vs placebo group. There was no increase in serious adverse events during tamoxifen therapy.

Study details: Findings are from a 10-year follow-up analysis of the phase 3 TAM-01 trial including 500 women with intraepithelial neoplasia of the breast who were randomly assigned to receive low-dose tamoxifen or placebo.

Disclosures: This study was supported by the Italian Ministry of Health and other sources. The authors declared serving as employees, consultants, or advisors, or receiving honoraria and travel and accommodation expenses from several sources.

Source: Lazzeroni M et al. Randomized placebo controlled trial of low-dose tamoxifen to prevent recurrence in breast noninvasive neoplasia: A 10-year follow-up of TAM-01 study. J Clin Oncol. 2023 (Mar 14). Doi: 10.1200/JCO.22.02900

Key clinical point: In women with noninvasive neoplasia of the breast, treatment with low-dose tamoxifen for 3 years continued to prevent breast cancer (BC) recurrence, with an optimal safety profile, for at least 7 years after treatment cessation.

Major finding: After a median follow-up of 9.7 years, fewer cases of both invasive and in-situ BC (hazard ratio [HR] 0.58; log-rank P  =  .03) and contralateral BC (HR 0.36; P  =  .025) were reported in the tamoxifen vs placebo group. There was no increase in serious adverse events during tamoxifen therapy.

Study details: Findings are from a 10-year follow-up analysis of the phase 3 TAM-01 trial including 500 women with intraepithelial neoplasia of the breast who were randomly assigned to receive low-dose tamoxifen or placebo.

Disclosures: This study was supported by the Italian Ministry of Health and other sources. The authors declared serving as employees, consultants, or advisors, or receiving honoraria and travel and accommodation expenses from several sources.

Source: Lazzeroni M et al. Randomized placebo controlled trial of low-dose tamoxifen to prevent recurrence in breast noninvasive neoplasia: A 10-year follow-up of TAM-01 study. J Clin Oncol. 2023 (Mar 14). Doi: 10.1200/JCO.22.02900

Key clinical point: In women with noninvasive neoplasia of the breast, treatment with low-dose tamoxifen for 3 years continued to prevent breast cancer (BC) recurrence, with an optimal safety profile, for at least 7 years after treatment cessation.

Major finding: After a median follow-up of 9.7 years, fewer cases of both invasive and in-situ BC (hazard ratio [HR] 0.58; log-rank P  =  .03) and contralateral BC (HR 0.36; P  =  .025) were reported in the tamoxifen vs placebo group. There was no increase in serious adverse events during tamoxifen therapy.

Study details: Findings are from a 10-year follow-up analysis of the phase 3 TAM-01 trial including 500 women with intraepithelial neoplasia of the breast who were randomly assigned to receive low-dose tamoxifen or placebo.

Disclosures: This study was supported by the Italian Ministry of Health and other sources. The authors declared serving as employees, consultants, or advisors, or receiving honoraria and travel and accommodation expenses from several sources.

Source: Lazzeroni M et al. Randomized placebo controlled trial of low-dose tamoxifen to prevent recurrence in breast noninvasive neoplasia: A 10-year follow-up of TAM-01 study. J Clin Oncol. 2023 (Mar 14). Doi: 10.1200/JCO.22.02900

Key clinical point: Current or recent use of either progestagen-only or oral estrogen+progestagen contraceptives increased the risk for breast cancer (BC) by 20%-30% in premenopausal women aged <50 years.

Major finding: Risk for incident BC was significantly increased in women who used vs did not use oral estrogen+progestagen (adjusted odds ratio [aOR] 1.23; P < .001), oral progestagen (aOR 1.26; P < .001), injectable progestagens (aOR 1.25; P  =  .004), or progestagen intra-uterine devices (aOR 1.32; P < .001).

Study details: Findings are from a nested case-control study including 9498 premenopausal women aged <50 years with BC and 18,171 matched control individuals and a meta-analysis including 12 observational studies for progestagen-only preparations.

Disclosures: This study was supported by the Cancer Epidemiology Unit by Cancer Research UK and UK Medical Research Council. The authors declared no conflicts of interest.

Source: Fitzpatrick D et al. Combined and progestagen-only hormonal contraceptives and breast cancer risk: A UK nested case–control study and meta-analysis. PLoS Med. 2023;20(3):e1004188 (Mar 21). Doi: 10.1371/journal.pmed.1004188

Key clinical point: Current or recent use of either progestagen-only or oral estrogen+progestagen contraceptives increased the risk for breast cancer (BC) by 20%-30% in premenopausal women aged <50 years.

Major finding: Risk for incident BC was significantly increased in women who used vs did not use oral estrogen+progestagen (adjusted odds ratio [aOR] 1.23; P < .001), oral progestagen (aOR 1.26; P < .001), injectable progestagens (aOR 1.25; P  =  .004), or progestagen intra-uterine devices (aOR 1.32; P < .001).

Study details: Findings are from a nested case-control study including 9498 premenopausal women aged <50 years with BC and 18,171 matched control individuals and a meta-analysis including 12 observational studies for progestagen-only preparations.

Disclosures: This study was supported by the Cancer Epidemiology Unit by Cancer Research UK and UK Medical Research Council. The authors declared no conflicts of interest.

Source: Fitzpatrick D et al. Combined and progestagen-only hormonal contraceptives and breast cancer risk: A UK nested case–control study and meta-analysis. PLoS Med. 2023;20(3):e1004188 (Mar 21). Doi: 10.1371/journal.pmed.1004188

Key clinical point: Current or recent use of either progestagen-only or oral estrogen+progestagen contraceptives increased the risk for breast cancer (BC) by 20%-30% in premenopausal women aged <50 years.

Major finding: Risk for incident BC was significantly increased in women who used vs did not use oral estrogen+progestagen (adjusted odds ratio [aOR] 1.23; P < .001), oral progestagen (aOR 1.26; P < .001), injectable progestagens (aOR 1.25; P  =  .004), or progestagen intra-uterine devices (aOR 1.32; P < .001).

Study details: Findings are from a nested case-control study including 9498 premenopausal women aged <50 years with BC and 18,171 matched control individuals and a meta-analysis including 12 observational studies for progestagen-only preparations.

Disclosures: This study was supported by the Cancer Epidemiology Unit by Cancer Research UK and UK Medical Research Council. The authors declared no conflicts of interest.

Source: Fitzpatrick D et al. Combined and progestagen-only hormonal contraceptives and breast cancer risk: A UK nested case–control study and meta-analysis. PLoS Med. 2023;20(3):e1004188 (Mar 21). Doi: 10.1371/journal.pmed.1004188

Key clinical point: Older patients with ductal carcinoma in situ (DCIS) of the breast or hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-positive (HER2+ or ERBB2+) early-stage breast cancer (BC) who underwent mastectomy vs lumpectomy experienced a significantly greater decline in frailty status.

Major finding: Women who underwent mastectomy vs lumpectomy were more likely to experience worse frailty (adjusted odds ratio 1.31; 95% CI 1.23-1.39).

Study details: Findings are from a cohort study including 31,084 women aged ≥65 years with DCIS (n = 9962) or HR+/ERBB2+ (n = 21,122) stage I BC, of which 22.6% and 77.4% of patients underwent mastectomy and lumpectomy, respectively.

Disclosures: This study was funded by the Brigham and Women’s Hospital Department of Surgery, Utah. Some authors declared serving as advisors, on the board of directors, and on steering committees, or receiving grants, personal fees, honoraria, or funding from various sources.

Source: Minami CA et al. Association of surgery with frailty status in older women with early-stage breast cancer. JAMA Surg. 2023 (Mar 15). Doi: 10.1001/jamasurg.2022.8146

Key clinical point: Older patients with ductal carcinoma in situ (DCIS) of the breast or hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-positive (HER2+ or ERBB2+) early-stage breast cancer (BC) who underwent mastectomy vs lumpectomy experienced a significantly greater decline in frailty status.

Major finding: Women who underwent mastectomy vs lumpectomy were more likely to experience worse frailty (adjusted odds ratio 1.31; 95% CI 1.23-1.39).

Study details: Findings are from a cohort study including 31,084 women aged ≥65 years with DCIS (n = 9962) or HR+/ERBB2+ (n = 21,122) stage I BC, of which 22.6% and 77.4% of patients underwent mastectomy and lumpectomy, respectively.

Disclosures: This study was funded by the Brigham and Women’s Hospital Department of Surgery, Utah. Some authors declared serving as advisors, on the board of directors, and on steering committees, or receiving grants, personal fees, honoraria, or funding from various sources.

Source: Minami CA et al. Association of surgery with frailty status in older women with early-stage breast cancer. JAMA Surg. 2023 (Mar 15). Doi: 10.1001/jamasurg.2022.8146

Key clinical point: Older patients with ductal carcinoma in situ (DCIS) of the breast or hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-positive (HER2+ or ERBB2+) early-stage breast cancer (BC) who underwent mastectomy vs lumpectomy experienced a significantly greater decline in frailty status.

Major finding: Women who underwent mastectomy vs lumpectomy were more likely to experience worse frailty (adjusted odds ratio 1.31; 95% CI 1.23-1.39).

Study details: Findings are from a cohort study including 31,084 women aged ≥65 years with DCIS (n = 9962) or HR+/ERBB2+ (n = 21,122) stage I BC, of which 22.6% and 77.4% of patients underwent mastectomy and lumpectomy, respectively.

Disclosures: This study was funded by the Brigham and Women’s Hospital Department of Surgery, Utah. Some authors declared serving as advisors, on the board of directors, and on steering committees, or receiving grants, personal fees, honoraria, or funding from various sources.

Source: Minami CA et al. Association of surgery with frailty status in older women with early-stage breast cancer. JAMA Surg. 2023 (Mar 15). Doi: 10.1001/jamasurg.2022.8146

Key clinical point: Weight loss after bariatric surgery reduced the risk of developing breast cancer (BC) in women with prior obesity to a level equivalent to that in women with a body mass index (BMI) of <25 kg/m².

Major finding: After a 1-year washout period, women who did vs did not undergo bariatric surgery had significantly reduced BC risk (hazard ratio [HR] 1.40; P < .001), equivalent to that in women with BMI <25 kg/m² (HR 1.07; P  =  .10). Weight loss after bariatric surgery was associated with reduced BC risk at 2- and 5-year washout periods as well (both P < .001).

Study details: Findings are from a population-based, multiple cohort study including 13,852 women with obesity who underwent bariatric surgery and 55,408 age- and BC screening status-matched women with no history of bariatric surgery, of which 659 women were diagnosed BC.

Disclosures: This study was supported by the Ontario Bariatric Registry, Canada, and ICES, Canada. The authors declared no conflicts of interest.

Source: Doumouras AG et al. Residual risk of breast cancer after bariatric surgery. JAMA Surg. 2023 (Apr 12). Doi: 10.1001/jamasurg.2023.0530

Key clinical point: Weight loss after bariatric surgery reduced the risk of developing breast cancer (BC) in women with prior obesity to a level equivalent to that in women with a body mass index (BMI) of <25 kg/m².

Major finding: After a 1-year washout period, women who did vs did not undergo bariatric surgery had significantly reduced BC risk (hazard ratio [HR] 1.40; P < .001), equivalent to that in women with BMI <25 kg/m² (HR 1.07; P  =  .10). Weight loss after bariatric surgery was associated with reduced BC risk at 2- and 5-year washout periods as well (both P < .001).

Study details: Findings are from a population-based, multiple cohort study including 13,852 women with obesity who underwent bariatric surgery and 55,408 age- and BC screening status-matched women with no history of bariatric surgery, of which 659 women were diagnosed BC.

Disclosures: This study was supported by the Ontario Bariatric Registry, Canada, and ICES, Canada. The authors declared no conflicts of interest.

Source: Doumouras AG et al. Residual risk of breast cancer after bariatric surgery. JAMA Surg. 2023 (Apr 12). Doi: 10.1001/jamasurg.2023.0530

Key clinical point: Weight loss after bariatric surgery reduced the risk of developing breast cancer (BC) in women with prior obesity to a level equivalent to that in women with a body mass index (BMI) of <25 kg/m².

Major finding: After a 1-year washout period, women who did vs did not undergo bariatric surgery had significantly reduced BC risk (hazard ratio [HR] 1.40; P < .001), equivalent to that in women with BMI <25 kg/m² (HR 1.07; P  =  .10). Weight loss after bariatric surgery was associated with reduced BC risk at 2- and 5-year washout periods as well (both P < .001).

Study details: Findings are from a population-based, multiple cohort study including 13,852 women with obesity who underwent bariatric surgery and 55,408 age- and BC screening status-matched women with no history of bariatric surgery, of which 659 women were diagnosed BC.

Disclosures: This study was supported by the Ontario Bariatric Registry, Canada, and ICES, Canada. The authors declared no conflicts of interest.

Source: Doumouras AG et al. Residual risk of breast cancer after bariatric surgery. JAMA Surg. 2023 (Apr 12). Doi: 10.1001/jamasurg.2023.0530

Key clinical point: Overall incidence of nodal disease was lower in patients with clinical T1-T2 (cT1-cT2)N0M0, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC) who received neoadjuvant chemotherapy (NAC) vs surgery.

Major finding: Incidence of nodal disease was ~20% in patients with cT1-cT2N0 BC who underwent upfront surgery, which increased to ~25% in patients with cT1c tumors, but was ~10% in patients with cT1-cT2N0 BC who received NAC. Receipt of NAC was significantly associated with a decreased risk for nodal positivity (adjusted odds ratio 0.411; P = .014).

Study details: Findings are from an analysis of two international cohorts including patients with cT1-cT2N0M0 HER2+ BC.

Disclosures: This study was funded by the US National Cancer Institute and other sources. The authors declared receiving fees, grants, or research funding, or having other ties with several sources.

Source: Weiss A et al. Nodal positivity and systemic therapy among patients with clinical T1-T2N0 human epidermal growth factor receptor-positive breast cancer: Results from two international cohorts. Cancer. 2023 (Mar 23). Doi: 10.1002/cncr.34750

Key clinical point: Overall incidence of nodal disease was lower in patients with clinical T1-T2 (cT1-cT2)N0M0, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC) who received neoadjuvant chemotherapy (NAC) vs surgery.

Major finding: Incidence of nodal disease was ~20% in patients with cT1-cT2N0 BC who underwent upfront surgery, which increased to ~25% in patients with cT1c tumors, but was ~10% in patients with cT1-cT2N0 BC who received NAC. Receipt of NAC was significantly associated with a decreased risk for nodal positivity (adjusted odds ratio 0.411; P = .014).

Study details: Findings are from an analysis of two international cohorts including patients with cT1-cT2N0M0 HER2+ BC.

Disclosures: This study was funded by the US National Cancer Institute and other sources. The authors declared receiving fees, grants, or research funding, or having other ties with several sources.

Source: Weiss A et al. Nodal positivity and systemic therapy among patients with clinical T1-T2N0 human epidermal growth factor receptor-positive breast cancer: Results from two international cohorts. Cancer. 2023 (Mar 23). Doi: 10.1002/cncr.34750

Key clinical point: Overall incidence of nodal disease was lower in patients with clinical T1-T2 (cT1-cT2)N0M0, human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC) who received neoadjuvant chemotherapy (NAC) vs surgery.

Major finding: Incidence of nodal disease was ~20% in patients with cT1-cT2N0 BC who underwent upfront surgery, which increased to ~25% in patients with cT1c tumors, but was ~10% in patients with cT1-cT2N0 BC who received NAC. Receipt of NAC was significantly associated with a decreased risk for nodal positivity (adjusted odds ratio 0.411; P = .014).

Study details: Findings are from an analysis of two international cohorts including patients with cT1-cT2N0M0 HER2+ BC.

Disclosures: This study was funded by the US National Cancer Institute and other sources. The authors declared receiving fees, grants, or research funding, or having other ties with several sources.

Source: Weiss A et al. Nodal positivity and systemic therapy among patients with clinical T1-T2N0 human epidermal growth factor receptor-positive breast cancer: Results from two international cohorts. Cancer. 2023 (Mar 23). Doi: 10.1002/cncr.34750