tumors which are comprised of germ cells (cells that develop into the reproductive system).
Types of tumors arising from a germ cell (the reproductive cells of the body, either the egg or sperm cells). Most commonly found as tumors of the testis, about 5% of all ovarian cancers and as an uncommon childhood brain tumor occuring in young persons between the ages of 11 and 30.
Tumors that begin in the cells that give rise to sperm or eggs. They can occur virtually anywhere in the body and can be either benign or malignant.
the most common type (over 9 out of 10 cases) of testicular cancer, germ cell tumors begin in the cells that make sperm. Most germ cell cancers begin as carcinoma in situ (CIS), a cancer that is not invasive (has not spread from where it started). Germ cell cancers are divided into two types: seminomas and nonseminomas.