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teratoma

Pronunciation: ter'a-to'ma

Definition: A type of germ cell tumor composed of multiple tissues, including tissues not normally found in the organ in which it arises. Teratomas occur most frequently in the ovary, where they are usually benign and form dermoid cysts; in the testis, they are usually malignant; and, uncommonly, in other sites, especially the midline of the body.

Synonym(s): teratoid tumor

[terato- + G. -oma, tumor]

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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