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 ?
Medulloepithelioma with heterologous osteoid component: a case report and review of literature.
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.
Three months after presentation, the bulge of the sclera was mimicking clinically a ciliary body tumor, namely, medulloepithelioma (Figure 2).
Medulloepithelioma. Medulloepithelioma is a rare congenital neuroepithelial tumor that arises from the nonpigmented ciliary epithelium of the ciliary body.
Neoplasia has been described that involves the retrobulbar area, including malignant lymphosarcoma, pituitary adenoma, adenocarcinoma, malignant intraocular medulloepithelioma, intraocular rhabdomyosarcoma, teratoma, and glioma.
In their study medulloblastomas, medulloepithelioma and meningiomas were negative for GFAP.
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.