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Cancer is cells in your body that grow abnormally and out of control. Eventually they form a mass and metastasize (spread) to other parts of the body. Almost all cancers will kill you if left untreated. Testicular cancer starts in the testicles and most commonly affects men in their 20s to 40s, but not always.
Testicular cancer is a type of cancer occurring in the testicles. The testicles, which are responsible for creating sperm and male sex hormones, are located in the scrotum underneath the base of the penis. Several types of cancer may grow in the testicles, including choriocarcinoma, embryonal carcinoma, teratoma, and seminoma. Testicular cancer typically only affects one of your two testicles.
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