Teratoma

Cancer Terms -> Diseases Disorders and Findings -> Diseases and Disorders -> Neoplasm -> Neoplasm by Morphology -> Germ Cell Neoplasm -> Teratoma

Teratoma Definition

A non-seminomatous germ cell tumor characterized by the presence of various tissues which correspond to the different germinal layers (endoderm, mesoderm, and ectoderm). It occurs in the testis, ovary, and extragonadal sites including central nervous system, mediastinum, lung, and stomach. According to the level of differentiation of the tissues which comprise the tumor, teratomas are classified as mature or immature. Mature teratomas are composed of well differentiated, adult-type tissues. Immature teratomas are composed of immature, fetal-type tissues. Testicular teratomas in children follow a benign clinical course. Mature ovarian teratomas without a fetal-type component have an excellent outcome. The prognosis of immature ovarian teratomas is related to the grade and stage of the tumor.

Teratoma Synonyms

Teratoma, teratoma

Terms in Teratoma category

Adult Teratoma
Cystic Teratoma
Immature Teratoma
Mature Teratoma
Teratoma with Malignant Transformation