Cancer in the organs that make sperm, called the testicles.
Testicular cancer starts in the testicles. The testicles are located inside a loose bag of skin, called the scrotum, underneath the penis. The testicles make sperm and hormones.
Symptoms include a lump in either testicle and a feeling of heaviness or pain in the scrotum.
It's very treatable. Treatments include surgery, radiation and chemotherapy.