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Medical Definition of Embryonal tumour
1. Embryonic tumour, a neoplasm, usually malignant, which arises during intrauterine or early postnatal development from an organ rudiment or immature tissue; it forms immature structures characteristic of the part from which it arises, and may form other tissues as well. The term includes neuroblastoma and Wilms' tumour, and is also used to include certain neoplasms presenting in later life, this usage being based on the belief that such tumours arise from embryonic rests. See: teratoma. Synonym: embryoma. (05 Mar 2000)
Lexicographical Neighbors of Embryonal Tumour
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