SCROTUM

Testicular cancer begins in one or both of the testicles. The testicles are located in the scrotum, the skin “sack” that hangs beneath the penis. They manufacture male hormones and produce sperm. A normal adult testicle is about the size of a golf ball and is round, smooth and firm.

Who gets testicular cancer?

Male reproductive system
Cancer of the testicles is the most common cancer in young men (15 to 34 years old). A man is more likely to get testicular cancer if any of the following are true about him:

Is white.
Has a father or brother who has or has had testicular cancer.
Has a testicle that did not come down into the scrotum (called an undescended testicle). This applies even if surgery was done to remove the testicle or bring it down.
Has small testicles or testicles that aren't shaped normally.