[Male breast cancer: prognostic factors, diagnosis and treatment: a multi-institutional survey of 95 cases].

OBJECTIVES: The optimal treatment for male breast cancer is not known because male breast cancer is a rare disease. It represents as little as 0.6% of all breast cancers and less than 1% of human cancers. The aim was to analyze the clinical, histological and therapeutic characteristics of 95 men cared for breast cancer between 2000 and 2010 in four hospitals, and determine predictors of poor prognosis to improve care of male breast cancer.

METHODS: This study is a multi-institutional survey, retrospective, involving four French institutions: Cancer Institute of the West (ICO), Reunion Island South hospital group, the hospital group of Dax, and the Bergonié Institute. All carcinomas in situ or invasive breast occurred in male patients were included. An analysis of clinical, histological and therapeutic features was performed. Statistical analysis of our study focused on the overall survival of patients and specific method of Kaplan-Meier, enabling search for predictors of poor prognosis.

RESULTS: The mean age was 65 years. Thirty-seven percent of patients were overweight or obese. It was in 88% of cases of palpable tumor whose average size was 26.29mm. Ninety patients, none had a lesion palpable T0, 44% T1 tumors, 38% T2 tumors, 3% had a T3 tumors, and finally 10% T4 tumors. The histological type was the most common invasive ductal carcinoma (87%). He found a similar proportion of patients with or without lymph node involvement. N+ patients, capsular rupture was observed in 29% of cases. Receptor positivity was found, estrogen in 95% of cases and progesterone in 83% of cases. Additional irradiation was performed in 75% of patients and chemotherapy in 37% of patients. Overall survival was 79.2% at five years and 70.8% at ten years. Age, tumor size and histological capsular rupture are factors that significantly influence the overall survival and specific.

CONCLUSION: Male breast cancer is a different pathology of breast cancer in women. The majority of recommendations suggest treating men who are diagnosed with breast cancer, using the guidelines applied to postmenopausal women treatments. There is no study based on male population that has evaluated these treatment modalities in terms of impact on survival. The diagnosis is usually made at later stages, and tumor size is often greater. Histological characteristics also differ. However, the treatment is almost identical.