Most breast cancers in men are ductal carcinomas. Ductal means the cancer started in the milk pipes of the breast, called ducts. These cancers are usually invasive because they start inside the duct and then break through the wall of the duct, growing into the normal surrounding breast tissue.
41 men with MMBC represented 25.6% of a total of 160 patients with MBC. 16 (39%) patients showed primary metastases, and 25 (61%) had recurrent metastases. Median survival from occurrence of metastasis was 32 months. Median overall survival (OS) was 68 months. 68.3% (n = 28) of the cohort received systemic therapy favoring endocrine therapy (n = 25, 61.9%).