Image may be NSFW. Clik here to view.By Mercura Wang, Medically Reviewed by Jimmy Almond, M.D. Testicular cancer occurs when malignant cells form in the tissues of one or, less commonly, both testicles. It affects approximately one in 250 males at some point in their lifetimes. In the United States, the American Cancer Society estimates approximately 9,760 new cases of testicular cancer […]