Male breast cancer is cancer that arises in the small amount of breast tissue present normally in males. Male breast cancer accounts for about 1% of all cases of breast cancer.
Breast cancers in males tend to cause symptoms and signs, including a painless lump in the breast. Other associated signs and symptoms can include
- discharge from the nipple,
- dimpling or puckering of the skin of the breast,
- redness or scaling of the breast, and
- nipple inversion.
Cause of Male Breast Cancer
As with breast cancer in women, the exact cause of male breast cancer is not fully understood, but genetic mutations may play a role in causing some breast cancers in men. Other factors that increase risk can include radiation therapy to the chest, exposure to higher-than-normal levels of estrogen, and certain genetic conditions.
Other male breast cancer symptoms and signs
- Dimpling or Puckering of the Skin of the Breast
- Discharge from the Nipple
- Nipple Inversion
- Painless Lump in the Breast
- Redness or Scaling of the Breast
Main Article on Male Breast Cancer Symptoms and Signs

QUESTION
A lump in the breast is almost always cancer. See AnswerExamples of Medications for Male Breast Cancer Symptoms and Signs
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