Seminoma is a malignant germ cell tumor involving a testicle or, less frequently, other extra-gonadal sites. It is seen in men around 15 to 35 years of age, and these tumors grow slowly. It is easy to treat such tumors as they are less likely to spread to other body parts.
Nonseminomatous Germ Cell Tumors: An Overview
Nonseminomatous germ cell tumors are cancerous tumors commonly seen in the brain, pineal gland, mediastinum, or in the abdomen.