medulloepithelioma


Also found in: Medical.

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.
Mentioned in ?
References in periodicals archive ?
Other lesions include fungal infections, pituitary adenoma, schwannoma, neurofibroma, carotid body paraganglioma, craniopharyngioma, arachnoid cyst, medulloblastoma and medulloepithelioma.
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.
5) The differential diagnosis for proptosis should include medulloepithelioma as a primary ocular tumor; rhabdomyosarcoma and optic nerve glioma as primary orbital tumors; fibroma, fibrous dysplasia and osteosarcoma as orbital bone tumors; and leukemia, lymphoma and neuroblastoma as metastatic tumors.
These patients included one case of choroid melanoma, one case of iris and ciliary body melanoma, one case of ciliary body medulloepithelioma, one case of intraocular metastases, one case of optic nerve sheath meningioma, and four cases of retinoblastoma.
Neoplasia has been described that involves the retrobulbar area, including malignant lymphosarcoma, pituitary adenoma, adenocarcinoma, malignant intraocular medulloepithelioma, intraocular rhabdomyosarcoma, teratoma, and glioma.
In addition to melanoma, the differential diagnosis of ciliary body tumors should include staphyloma, medulloepithelioma and leiomyoma.
Intraocular medulloepithelioma is another lesion that should be differentiated from retinoblastoma.
Retinoblastoma and medulloepithelioma are highly cellular tumors, often containing neuroepithelial rosettes.
Immunohistochemical characterization of a malignant intraocular teratoid medulloepithelioma in a cockatiel.
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.
Results: Fine-needle aspiration biopsy of 14 patients showed that 3 had optic nerve melanocytoma, 2 had chorodial melanoma, 1 had iridociliary medulloepithelioma, 1 had iris melanoma, 1 had trabecular meshwork melanoma, 1 had iris nevus, 1 had leukemic infiltration, 1 had lymphoma, 1 had neuroendocrine carcinoma,
Intraocular medulloepithelioma is a congenital tumor of the nonpigmented ciliary epithelium, usually diagnosed in childhood.