embryonal 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 ?
This trio of uniformly aggressive embryonal neoplasms, including the embryonal tumor with abundant neuropil and true rosettes, the ependymoblastoma, and the medulloepithelioma, are histologically united by the shared feature of lumen-forming, multilayered, ependymoblastic" rosettes.
Wilm's tumor is the most common embryonal tumor in patients with BWS followed by hepatoblastoma.
The atypical teratoid/rhabdoid tumor (AT/RT) is a clinically aggressive embryonal tumor of infancy that occurs in the posterior fossa and cerebral hemispheres.
The AT/RT is an aggressive, malignant, embryonal tumor most commonly composed of epithelioid cells with round nuclei and prominent nucleoli with frequent mitotic figures.
Report on 11 cases of a distinctive embryonal tumor with favorable prognosis.
Medulloblastoma is a malignant embryonal tumor of the cerebellum, accounting for 14% of all pediatric central nervous system tumors, (3) and it is one of the so-called malignant small blue cell tumors bearing histological similarity to SCC.
The medulloblastoma (MDB) is defined as a malignant, invasive embryonal tumor of the cerebellum, preferentially occurring in children and adolescents, with a propensity for leptomeningeal dissemination.
This free, day-long event, entitled "New Drugs for New Cures," will highlight the latest activity in treatment for cancers such as sarcomas, embryonal tumors, brain cancers, and leukemia.
Among infants up to 36 months of age, the usually fast growing embryonal tumors medulloblastoma and central nervous system (CNS) primitive neuroectodermal tumor (PNET) are the most frequent brain neoplasms; among all children up to age 15 years, astrocytoma is the most common form of glioma (McKean-Cowdin et al.
In primary tumors, increasing of the copies number hTERT identified in 12% norobelasma, 42% embryonal tumors (CNS), 22% Hpatocellular carcinoma, 30-63% lung cancer,, 24-30% of cervical cancers, 26% of breast cancers and 48% of colon cancer.