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Embryonal Neoplasm
Definition 1
A usually malignant neoplasm composed of primitive (immature) tissues that resemble fetal tissues. Medulloblastoma, Ependymoblastoma, Pineoblastoma, and Wilms tumor are representative embryonal neoplasms. --2003 (NCI Thesaurus)
Definition 2
A mass of rapidly growing cells that begins in embryonic (fetal) tissue. Embryonal tumors may be benign or malignant, and include neuroblastomas and Wilms tumors. (NCI Dictionary)
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The branch of biology that studies the formation and early development of living organisms.
Body tissue, region, surface, cavity, fluid, organ, or collection of organs present in, or associated with, an embryo.
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