Meningeal Melanocytoma Associated with Ota's Nevus: Report of a case

ABSTRACT

Primary meningeal melanocytoma of the central nervous system is extremely rare. We report a case of meningeal melanocytoma associated with Ota's nevus as a recurrent form in a 53-year old male. The meningeal melanocytoma was removed from right parietooccipital lobe 4 years ago and recurred in right parietal, occipital and left frontal lobes. Ultrastructurally, the tumor cells were characterized by the presence of numerous melanosomes and premelanosomes in their cytoplasm. Moreover, the tumor was lacking in histologic and ultrastructural features of pigmented meningioma, melanotic schwannoma and prolonged clinical course was different from primary meningeal melanoma or metastatic malignant melanoma.