A tumor forms. This usually happens in an ovary or testicle. You can also get a germ cell tumor in your brain, chest, belly, pelvis, or lower back, but it’s not as common. Changes in the genes ...

Germ cell cancers can start in the spine, chest, and brain. What causes germ cell tumors? We do not know what causes germ cell cancers. However, some tumors start in children who do not have a normal ...