embryonal tumor

(redirected from embryonic tumor)

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 ?
Most important differential diagnosis to infantile hemangioendothelioma is hepatoblastoma which is a malignant embryonic tumor seen in infants and children.
As patients are often young, SPPT is suggested to be an embryonic tumor [5], although this has not been proved and further studies regarding its origin are needed.
MORPHOLOGY: Wilms' tumor is an embryonic tumor typically composed of variable admixture of blastemal, epithelial and stromal components.
Embryonic tumors are masses arising from rudimentary or immature tissue during fetal life.
Zimmerman LE: Verhoeff's "terato-neuroma": a critical reappraisal in light of new observations and current concepts of embryonic tumors.