Breast cancer in men is 100 times less common than in women. The main risk 
factors include: the mutation of genes BRCA 1 and 2, Klinefelter's syndrome, 
alcohol, liver disease, obesity. Clinical examinations, mammography and 
ultrasound are informative and highly sensitive for early detection of these 
tumors, but are rarely implemented due to lack of awareness of general 
practitioners. Local treatment includes the Patey-Dyson mastectomy and radiation 
therapy. Adjuvant systemic therapy is determined by pTNM and typically involves 
tamoxifen.