Early breast cancer in women aged 35 years or younger: A large national multicenter French population-based case control-matched analysis

Autor: Ondine Dufour, Gilles Houvenaeghel, Jean-Marc Classe, Monique Cohen, Christelle Faure, Chafika Mazouni, Marie-Pierre Chauvet, Eva Jouve, Emile Darai, Anne-Sophie Azuar, Pierre Gimbergues, Anthony Gonçalves, Alexandre de Nonneville
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Breast, Vol 68, Iss , Pp 163-172 (2023)
Druh dokumentu: article
ISSN: 1532-3080
DOI: 10.1016/j.breast.2023.02.004
Popis: Background: There is a scarcity of data exploring early breast cancer (eBC) in very young patients. We assessed shared and intrinsic prognostic factors in a large cohort of patients aged ≤35, compared to a control group aged 36 to 50. Methods: Patients ≤50 were retrospectively identified from a multicentric cohort of 23,134 eBC patients who underwent primary surgery between 1990 and 2014. Multivariate Cox analyses for DFS and OS were built. To assess the independent impact of age, 1 to 3 case-control analysis was performed by matching ≤35 and 36–50 years patients. Results: Of 6481 patients, 556 were aged ≤35, and 5925 from 36 to 50. Age ≤35 was associated with larger tumors, higher grade, ER-negativity, macroscopic lymph node involvement (pN + macro), lymphovascular invasion (LVI), mastectomy, and chemotherapy (CT) use. In multivariate analysis, age ≤35 was associated with worse DFS [HR 1.56, 95% CI 1.32–1.84; p
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