teratoma

teratoma /ter·a·to·ma/ (ter″ah-to´mah) pl. terato´mata, teratomas   a true neoplasm made up of different types of tissue, none of which is native to the area in which it occurs; usually found in the ovary or testis.teratom´atous

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malignant teratoma 

1. a solid, malignant ovarian tumor resembling a dermoid cyst but composed of immature embryonal and/or extraembryonal elements derived from all three germ layers.

2. teratocarcinoma.

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ter·a·to·ma (tr-tm)

n. pl. ter·a·to·mas or ter·a·to·ma·ta (-m-t)

A tumor consisting of different types of tissue, as of skin, hair, and muscle, caused by the development of independent germ cells. Also called teratoblastoma, teratoid tumor.

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tera·toma·tous (-tm-ts) adj.

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teratoma

[ter′ətō′mə] pl. teratomas, teratomata,

a tumor composed of different kinds of tissue, none of which normally occurs together or at the site of the tumor. Teratomas are most common in the ovaries or testes.

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teratoma [ter″ah-to´mah]

a type of germ cell tumor made up of a number of different types of tissue from one or more of the germ cell layers; it is usually found in the ovary or testis and may be either benign or malignant.

malignant teratoma a solid, malignant ovarian tumor resembling a dermoid cyst but composed of immature embryonal or extraembryonal elements derived from all three germ layers.

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teratoma (ter´tō´m),

n a tumor composed of cells capable of differentiating into any of the three primary germ layers. Teratomas in the ovary are usually benign dermoidal cysts; those in the testis are generally malignant.

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teratoma

a true neoplasm made up of a number of different types of tissue, none of which is native to the area in which it occurs; usually found in the ovary or testis. See also dermoid cyst.

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malignant teratoma

a solid, malignant ovarian tumor resembling a dermoid cyst but composed of immature embryonal or extraembryonal elements derived from all three germ layers.