There is a spectrum of primary melanotic lesions involving the central nervous system. It ranges from well differentiated primary melanocytomas at the benign end of the spectrum to the malignant melanomas at the other end . Primary intracranial meningeal melanocytoma (PIMM) is a relatively rare lesion, which belongs to the benign end of these melanotic lesions. It has good prognosis, is histologically and clinically distinct from the malignant lesions, and needs to be considered in the differential diagnosis of melanotic lesions on imaging studies.
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(Author: Manoj Kumar, Murat Gokden