What is it?
Testicular cancer is the uncontrolled growth of abnormal cells in one or both testicles (testes). The testicles are the male sex glands. They are located in the scrotum, behind the penis. They produce testosterone and other male hormones. The testicles also produce and store sperm, the male cells needed for reproduction.
Once testicular cancer develops, it can remain within the testicle, or it can spread to lymph nodes in the abdomen or pelvis. If it is not detected and treated, testicular cancer eventually can spread to the lungs, brain, liver, and other parts of the body. Certain types of testicular cancer are more likely to spread than others.