Abstract:
AIM:The aim of this study was to assess the molecular subtype profiles of male breast cancer (MBC) and subsequent clinical outcome using a validated 6-marker immunohistochemical panel. METHODS:A total of 43 cases of MBC were examined retrospectively using a semiquantitative immunohistochemical analysis of estrogen receptor (ER), progesterone receptor (PR), Ki-67, human epidermal growth factor receptor 2 (Her2), epidermal growth factor receptor and cytokeratin 5/6. Patients were classified into the following categories: luminal A, luminal B, Her2-positive or basal-like subtypes. RESULTS:The median age of patients was 63 years (r: 32-89). The predominant histology was invasive ductal carcinoma (91%). Only 1 patient had advanced breast cancer at diagnosis. Ninety-three percent were ER-positive and 84% were PR-positive. Two patients had tumors that were ER- and PR-negative. The distribution of tumor molecular subtypes was 19 (44%) luminal A, 22 (51%) luminal B and 2 (5%) basal-like. The Her2-positive tumor subtype was not identified. The clinicopathological characteristics did not differ significantly between tumor subtypes A and B. There were no significant differences in 6-year disease-free survival (74 vs. 82%, p = 0.77) or overall survival (74 vs. 82%, p = 0.69) between luminal A and luminal B subtypes, respectively. CONCLUSION:The most common subtypes in our cohort of MBC were luminal B followed by luminal A, and no differences were found between both tumor subtypes in terms of clinicopathologic characteristics and patient outcome.
journal_name
Oncologyjournal_title
Oncologyauthors
Sánchez-Muñoz A,Román-Jobacho A,Pérez-Villa L,Sánchez-Rovira P,Miramón J,Pérez D,Sáez MI,de Luque V,Medina L,Ramírez-Tortosa CL,Vicioso L,Medina JA,Ribelles N,Alba Edoi
10.1159/000341537subject
Has Abstractpub_date
2012-01-01 00:00:00pages
228-33issue
4eissn
0030-2414issn
1423-0232pii
000341537journal_volume
83pub_type
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