What Is Testicular Cancer?

Testis (or testicular) cancer is relatively uncommon, accounting for only one percent of cancers in men. However, testis cancers are the most common solid-organ malignancy in men under the age of 35. Men that have a brother or father with testis cancer are more likely to develop testis cancer. Most testis cancers are curable with surgery alone and overall, the survival of men with testis cancer is the highest for any non-skin cancer.

The main function of the testis is to:

  • Produce semen for reproduction and
  • Produce masculine hormones (testosterone)

The majority of testis cancers (98 percent) develop from germ cells that develop into sperm.