extragonadal germ cell tumors treatment pdq treatment patient information nci nci

Extragonadal germ cell tumors form from developing sperm or egg cells that travel from the gonads to other parts of the body."Extragonadal" means outside of the gonads (sex organs). When cells that are meant to form sperm in the testicles or eggs in the ovaries travel to other parts of the body, they may grow...