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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.