Germ cell tumors can show up in the testicles, ovaries, or along the midline of the body. The first thing people usually notice is a painless lump or swelling. In the testicle it feels like a firm, heavy ball that does not go away. In the ovary it can cause bloating or a tight waistband even when weight has not changed. If the tumor makes hormones, the body may shift quickly. Boys can grow breast tissue or feel tender nipples. Girls may skip periods or start unexpected vaginal bleeding. Some people notice deeper voice or facial hair that was not... Learn more