We report an unusual case of meningeal melanocytoma, a rare pigmented lesion of the leptomeninges, that occurred within the leptomeninges of the thoracic spinal canal. The lesion showed increased signal intensity on T1-weighted MR images relative to gray matter, was isointense with gray matter on T2-weighted images, and enhanced mildly but homogeneously after administration of contrast material.

Objective: Pigmented epithelioid melanocytoma was proposed by Zembowicz et al in 2004 including lesions previously diagnosed as human animal-type melanoma and epithelioid blue nevus. Tumors are composed of epithelioid and spindled melanocytes with heavy pigmentation. Methods: We report a case of pigmented epithelioid melanocytoma in 47-year-old Asian woman. The tumor sized 10 × 6 × 2 cm on the ...

Case DescriptionA twoyear-old female goat with a dark mass on the left hoof was referred to veterinary clinic of Shahid Bahonar University of Kerman. Clinical FindingsA large black and hemorrhagic tumor-like tissue was observed on the left hoof. The epidermis was intact and hairless. Treatment and OutcomeConsidering the good body condition of the patient, the mass was removed surgically. Cefazo...

During the recent period, dermoscopy has yielded improvement in the early disclosure of various atypical melanocytic neoplasms (AMN) of the skin. Beyond this clinical procedure, AMN histopathology remains mandatory for establishing their precise diagnosis. Of note, panels of experts in AMN merely report moderate agreement in various puzzling cases. Divergences in opinion and misdiagnosis are li...

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...

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...

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...

CASE REPORT A 33 year-old female with a large, unilateral, dark tumour of the optic disk with a presumed diagnosis of melanocytoma. After a follow-up of nineteen years, the tumour produced massive intraocular seeding with cataract, secondary glaucoma (pigmentary, melanocytomalytic, inflammatory and pupillary seclusion glaucoma) and amaurosis. The eye is enucleated and the pathological examinati...