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.
The number of patients having chemotherapy has increased by 13% between 2000-2004 and 2005-2009. The largest increase was for cancers which had a previously low rate of chemotherapy. The percentage having surgery has increased by 2%, and radiotherapy by 4%.