The CDC suggests three types of breast cancer that can be detected and diagnosed in men.

– Invasive ductal carcinoma: This type of breast cancer starts in the ducts and then grows outside the ducts into other parts of the breast tissues.

– Invasive lobular carcinoma: The cancer cells begin in the lobules and then spread to the closely-knitted breast tissues.

– Ductal carcinoma in situ (DCIS): These may lead to invasive breast cancer, since they’re only in the lining of the ducts, and have not spread to other breast tissues.

Breast cancers in men and women can be diagnosed with the help of mammogram, ultrasound, a nipple discharge test or a biopsy. Regular self-examination of the breast can also help with diagnosis.