embryoma

embryoma

 [em″bre-o´mah]
any of various neoplasms thought to be derived from embryonic cells or tissues, such as dermoid cysts, teratomas, and embryonal carcinomas.

em·bry·o·nal tu·mor

, embryonic tumor
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 tumor, and is also used to include certain neoplasms presenting in later life, this usage being based on the belief that such tumors arise from embryonic rests.
See also: teratoma.
Synonym(s): embryoma

em·bry·o·nal tu·mor

, embryonic tumor (em'brē-ōn'ăl tū'mŏr, em'brē-on'ik)
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 tumor and is also used to include certain neoplasms presenting in later life, this usage being based on the belief that such tumors arise from embryonic rests, which are fragments of embryonic tissue that are still present after the embryonic period.
See also: teratoma
Synonym(s): embryoma.
References in periodicals archive ?
Sialoblastoma (embryoma): MR findings of a rare pediatric salivary gland tumor.
(1) In 1966, 2 cases were reported and referred to as embryomas. (2) In 1988, the term sialoblastoma was coined by Taylor to describe these lesions because it conveyed the dysontogenetic character and the site of the tumour.
In 1966, Vawter and Tefft described the first cases of a salivary gland tumor of epithelial origin, which they called an embryoma. (10) Since then, various terms have been used to describe this tumor, including congenital basal cell adenoma, basaloid adenoma, and congenital hybrid basal cell adenoma--adenoid cystic carcinoma.