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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Cáncer de seno (mama) masculino

Male breast cancer (mayl brest KAN-ser)
Cancer that forms in tissues of the breast in men. Most male breast cancer begins in cells lining the ducts. It is very rare and usually affects older men.

Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.