TY - JOUR
T1 - The effect of (neo)adjuvant chemotherapy on long-term survival outcomes in patients with invasive lobular breast cancer treated with endocrine therapy
T2 - A retrospective cohort study
AU - Öztekin, Selin
AU - Hooning, Maartje J.
AU - van Deurzen, Carolien H.M.
AU - Dietvorst, Anne Marie H.P.
AU - Drooger, Jan C.
AU - Kitzen, Jos J.E.M.
AU - Martens, John W.M.
AU - van der Padt-Pruijsten, Annemieke
AU - Vastbinder, Mijntje B.
AU - Zuetenhorst, Hanneke
AU - Heemskerk-Gerritsen, Bernadette A.M.
AU - Jager, Agnes
N1 - Publisher Copyright:
© 2023 The Authors. Cancer published by Wiley Periodicals LLC on behalf of American Cancer Society.
PY - 2024/3/15
Y1 - 2024/3/15
N2 - Background: Despite histological and molecular differences between invasive lobular carcinoma (ILC) and invasive carcinoma of no special type, according to national treatment guidelines no distinction is made regarding the use of (neo)adjuvant chemotherapy. Studies on the long-term outcome of chemotherapy in patients with ILC are scarce and show inconclusive results. Methods:All patients with estrogen receptor (ER)–positive, human epidermal growth factor receptor 2 (HER2)–negative ILC with an indication for chemotherapy treated with adjuvant endocrine therapy were selected from the Erasmus Medical Center Breast Cancer database. Cox proportional hazards models were used to estimate the effect of chemotherapy on recurrence-free survival (RFS), breast cancer–specific survival (BCSS), and overall survival (OS). Results: A total of 520 patients were selected, of whom 379 were treated with chemotherapy and 141 were not. Patients in the chemotherapy group were younger (51 vs. 61 years old; p <.001), had a higher T status (T3+, 33% vs. 14%; p <.001), and more often had lymph node involvement (80% vs. 49%; p <.001) in comparison to the no-chemotherapy group. After adjusting for confounders, chemotherapy treatment was not associated with better RFS (hazard ratio [HR], 1.20; 95% confidence interval [CI], 0.63–2.31), BCSS (HR, 1.24; 95% CI, 0.60–2.58), or OS (HR, 0.97; 95% CI, 0.56–1.66). This was also reflected by adjusted Cox survival curves in the chemotherapy versus no-chemotherapy group for RFS (75% vs. 79%), BCSS (80% vs. 84%), and OS (72% vs. 71%). Conclusions:Chemotherapy is not associated with improved RFS, BCSS, or OS for patients with ER+/HER2− ILC treated with adjuvant endocrine therapy and with an indication for chemotherapy.
AB - Background: Despite histological and molecular differences between invasive lobular carcinoma (ILC) and invasive carcinoma of no special type, according to national treatment guidelines no distinction is made regarding the use of (neo)adjuvant chemotherapy. Studies on the long-term outcome of chemotherapy in patients with ILC are scarce and show inconclusive results. Methods:All patients with estrogen receptor (ER)–positive, human epidermal growth factor receptor 2 (HER2)–negative ILC with an indication for chemotherapy treated with adjuvant endocrine therapy were selected from the Erasmus Medical Center Breast Cancer database. Cox proportional hazards models were used to estimate the effect of chemotherapy on recurrence-free survival (RFS), breast cancer–specific survival (BCSS), and overall survival (OS). Results: A total of 520 patients were selected, of whom 379 were treated with chemotherapy and 141 were not. Patients in the chemotherapy group were younger (51 vs. 61 years old; p <.001), had a higher T status (T3+, 33% vs. 14%; p <.001), and more often had lymph node involvement (80% vs. 49%; p <.001) in comparison to the no-chemotherapy group. After adjusting for confounders, chemotherapy treatment was not associated with better RFS (hazard ratio [HR], 1.20; 95% confidence interval [CI], 0.63–2.31), BCSS (HR, 1.24; 95% CI, 0.60–2.58), or OS (HR, 0.97; 95% CI, 0.56–1.66). This was also reflected by adjusted Cox survival curves in the chemotherapy versus no-chemotherapy group for RFS (75% vs. 79%), BCSS (80% vs. 84%), and OS (72% vs. 71%). Conclusions:Chemotherapy is not associated with improved RFS, BCSS, or OS for patients with ER+/HER2− ILC treated with adjuvant endocrine therapy and with an indication for chemotherapy.
UR - https://www.scopus.com/pages/publications/85177196908
U2 - 10.1002/cncr.35125
DO - 10.1002/cncr.35125
M3 - Article
C2 - 37985357
AN - SCOPUS:85177196908
SN - 0008-543X
VL - 130
SP - 927
EP - 935
JO - Cancer
JF - Cancer
IS - 6
ER -
