Germ cell tumor (GCT) is a tumor (neoplasm) derived from germ cells. (Germ cells themselves are not pathogenic; i.e., they are not the viral and bacterial "germs" that cause illness.) Germ cell tumors can occur both inside and outside of the gonads (ovary and testis).
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Tumor /tu·mor/ 1. swelling, one of the cardinal signs of inflammation; morbid enlargement. 2. neoplasm; a new growth of tissue in which cell [more]Germ cell tumor - Community and Resources
A type of tumor that begins in the cells that give rise to sperm or eggs. Germ cell tumors can occur almost anywhere in the body and can be either benign or malignant.