Meningeal melanocytoma (“melanotic meningioma”). Its melanocytic origin as revealed by electron microscopy
نویسندگان
چکیده
منابع مشابه
CT and MR of meningeal melanocytoma.
The majority of melanotic neoplasms of the CNS are metastatic in origin. Rarely, a primary CNS melanoma arises from the leptomeninges, which in certain regions normally contain melanocytic cells [1]. These primary neoplasms are usually histologically and clinically malignant [2]. The meningeal melanocytoma is at the benign end of the spectrum of primary melanotic neoplasms and is less common th...
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The term "meningeal melanocytoma" was first used by Limas and Tio in 1972 to describe a benign tumor of melanocytic origin arising from the leptomeninges [2]. In the World Health Organization classification of brain tumor, meningeal melanocytoma represents a subgroup of primary melanocytic lesion, which most frequently originates from the leptomeninges of posterior fossa or along the spinal cor...
متن کاملPrimary meningeal melanocytoma.
Meningeal melanocytoma is an uncommon benign pigmented primary lesion that has to be distinguished as a pathological entity separate from other benign melanin containing tumours as well as its overtly malignant counterpart, melanoma. In the present study, a 58 year old lady presented with bilateral sensory and motor symptoms in the lower limbs. The MRI scan showed a dumb-bell shaped lesion in t...
متن کاملSpinal meningeal melanocytoma.
A case of spinal meningeal melanocytoma is reported along with clinicopathologic, immunohistochemical and ultrastructural studies. This patient presented clinically with paraparesis, tingling sensation and numbness of both lower extremities of 4 months duration. No mucocutaneous pigmented nevi were found. On operation, scattered coal-black pigmented lesions were found in the meninges between T3...
متن کاملIntracranial Meningeal Melanocytoma: Review of the Literature
Primary pigmented tumors of the cerebrospinal meninges are rare and uncommon group of melanin-containing neoplasms. They include pigmented meningioma, malignant melanoma, meningeal melanocytoma, melanotic schwannoma and melanoblastosis. These tumors are different in biological behavior, treatment and prognosis. Valenti was the first to describe pigmented cells normally found in the leptomeninge...
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ژورنال
عنوان ژورنال: Cancer
سال: 1972
ISSN: 0008-543X,1097-0142
DOI: 10.1002/1097-0142(197211)30:5<1286::aid-cncr2820300522>3.0.co;2-v