medulloepithelioma


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medulloepithelioma

[mə‚dəl·ō‚ep·ə‚thē·lē′ō·mə]
(medicine)
A locally invasive tumor of the eye arising from the ciliary epithelium of the iris.
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DICER1-related conditions include PPB, SLCT, cystic nephroma, ciliary body medulloepithelioma, certain thyroid conditions and rare tumors of the cervix, among others.
1) Medulloepithelioma is another primary intraocular tumor of childhood that arises in the ciliary epithelium and may contain small round blue cells similar in histologic appearance to retinoblastoma.
Additionally, rhabdomyosarcoma, a small round blue cell tumor, has been reported to arise in a ciliary body medulloepithelioma.
Neoplasia has been described that involves the retrobulbar area, including malignant lymphosarcoma, pituitary adenoma, adenocarcinoma, malignant intraocular medulloepithelioma, intraocular rhabdomyosarcoma, teratoma, and glioma.
Intraocular medulloepithelioma is a congenital tumor of the nonpigmented ciliary epithelium, usually diagnosed in childhood.
Confusing names attached to intraocular medulloepithelioma in the past have hampered effective communication and probably delayed a logical system of classification for tumors of the ciliary epithelium.
Immunohistochemical characterization of a malignant intraocular teratoid medulloepithelioma in a cockatiel.
118,119) These are typically pediatric tumors and include medulloblastoma, supratentorial "central" PNET, medulloepithelioma, ependymoblastoma, and atypical teratoid rhabdoid tumor (AT/RT).
A variety of melanotic brain tumors have been described in the literature, including ependymoma, choroid plexus papilloma and carcinoma, medulloblastoma, medulloepithelioma, schwannoma, meningioma, melanocytoma, and melanoma.
Melanotic tumors of the central nervous system include ependymomas,[1,2] choroid plexus papillomas[3-5] and carcinomas,[6,7] medulloblastomas,[8-10] primitive pineal tumors,[11-13] and medulloepitheliomas.
1-6] Differentiation into specific mesenchymal tissues, such as cartilage, bone, skeletal muscle, smooth muscle, or adipose tissue in these embryonal tumors, is rare and has been reported in a few cases of medulloblastoma,[7-12] a cerebral medulloepithelioma,[13] and a case of cerebral PNET.
Peripheral PNETs include peripheral neuroepitheliomas, peripheral medulloepitheliomas, Askin' s tumors, and (the recently added) Ewing's sarcomas.