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1 "Jae-ho Jeong"
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Original Article
Breast cancer
Impacts of Subtype on Clinical Feature and Outcome of Male Breast Cancer: Multicenter Study in Korea (KCSG BR16-09)
Jieun Lee, Keun Seok Lee, Sung Hoon Sim, Heejung Chae, Joohyuk Sohn, Gun Min Kim, Kyung-Hee Lee, Su Hwan Kang, Kyung Hae Jung, Jae-ho Jeong, Jae Ho Byun, Su-Jin Koh, Kyoung Eun Lee, Seungtaek Lim, Hee Jun Kim, Hye Sung Won, Hyung Soon Park, Guk Jin Lee, Soojung Hong, Sun Kyung Baek, Soon Il Lee, Moon Young Choi, In Sook Woo
Cancer Res Treat. 2023;55(1):123-135.   Published online March 24, 2022
DOI: https://doi.org/10.4143/crt.2021.1561
AbstractAbstract PDFSupplementary MaterialPubReaderePub
Purpose
The treatment of male breast cancer (MBC) has been extrapolated from female breast cancer (FBC) because of its rarity despite their different clinicopathologic characteristics. We aimed to investigate the distribution of intrinsic subtypes based on immunohistochemistry, their clinical impact, and treatment pattern in clinical practice through a multicenter study in Korea.
Materials and Methods
We retrospectively analyzed clinical data of 248 MBC patients from 18 institutions across the country from January 1995 to July 2016.
Results
The median age of MBC patients was 63 years (range, 25 to 102 years). Among 148 intrinsic subtype classified patients, 61 (41.2%), 44 (29.7%), 29 (19.5%), and 14 (9.5%) were luminal A, luminal B, human epidermal growth factor receptor 2, and triple-negative breast cancer, respectively. Luminal A subtype showed trends for superior survival compared to other subtypes. Most hormone receptor-positive patients (166 patients, 82.6%) received adjuvant endocrine treatment. Five-year completion of adjuvant endocrine treatment was associated with superior disease-free survival (DFS) in patients classified with an intrinsic subtype (hazard ratio [HR], 0.15; 95% confidence interval [CI], 0.04 to 0.49; p=0.002) and in all patients (HR, 0.16; 95% CI, 0.05 to 0.54; p=0.003).
Conclusion
Distribution of subtypes of MBC was similar to FBC and luminal type A was most common. Overall survival tended to be improved for luminal A subtype, although there was no statistical significance. Completion of adjuvant endocrine treatment was associated with prolonged DFS in intrinsic subtype classified patients. MBC patients tended to receive less treatment. MBC patients should receive standard treatment according to guidelines as FBC patients.

Citations

Citations to this article as recorded by  
  • HER2 expression and pathway status in male breast cancer patients: results of an integrated analysis among 6,150 patients
    Boqiang Lyu, Shidi Zhao, Hui Wang, Shouping Gong, Biyuan Wang
    Scientific Reports.2025;[Epub]     CrossRef
  • Clinicopathologic Features and Prognoses of Male Patients With Breast Cancer
    Meiling Huang, Jingjing Xiao, Changjiao Yan, Rui Ling, Ting Wang
    American Journal of Men's Health.2024;[Epub]     CrossRef
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