Glossary
Testicular cancer
(tes-TIH-kyoo-ler KAN-ser)
Cancer that forms in tissues of one or both testicles. Testicular cancer is most common in young or middle-aged men. Most testicular cancers begin in germ cells (cells that make sperm) and are called testicular germ cell tumors.
Definition from the National Cancer Institute’s NCI Dictionary of Cancer Terms.