Male Breast Cancer: Symptoms & Signs

Medically Reviewed on 1/6/2022

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


A lump in the breast is almost always cancer. See Answer

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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.