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We describe here a rare case of the transformation of a supratentorial melanocytoma and diffuse melanocytosis into a primary malignant, CNS melanoma. A 71-year-old woman was admitted after suffering from bulbar speech and dysfunction of fine motor skills for three years. Cerebral imaging revealed an inhomogeneous tumor mass in the right frontal lobe. After craniotomy and opening of the dura, a partially...
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