Dictionary: teratocarcinoma   (tĕr'ə-tō-kär'sə-nō'mə)

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A malignant teratoma, most often of the testes.

1. A malignant teratoma occurring most commonly in the testis.
2. A malignant epithelioma arising in a teratoma.

A malignant neoplasm consisting of elements of teratoma with those of embryonal carcinoma or choriocarcinoma, or both; occurring most often in the testis, occasionally in uterus.