Symptoms may be minimal if the tumor is small. A testicular<unk>  may present as a painless lump. Complications may include ovarian torsion, testicular torsion, or hydrops fetalis. They are a type of germ cell tumor (a tumor that begins in the cells that give rise to sperm or eggs). They are divided into two types: mature and immature. Mature<unk> s include dermoid cysts and are generally benign. Immature<unk> s may be cancerous. Most ovarian<unk> s are mature. In adults, testicular<unk> s are generally cancerous. Definitive diagnosis is based on a tissue biopsy. Treatment of coccyx, testicular, and ovarian<unk> s is generally by surgery. Testicular and immature ovarian<unk> s are also frequently treated with chemotherapy.<unk> s occur in the coccyx in about one in 30,000 newborns, making them one of the most common tumors in this age group. Females are affected more often than males. Ovarian<unk> s represent about a quarter of ovarian tumors and are typically noticed during middle age. Testicular<unk> s represent almost half of testicular cancers. They can occur in both children and adults. The term comes from the Greek word for "monster" plus the "-oma" suffix used for tumors.
Teratoma
Lipoma
Embryoma
Dermoid cyst
Gonadoblastoma
Spina bifida
Immature teratoma
Blastoma