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Up to: Central nervous system melanocytic neoplasm
Diffuse meningeal melanocytosis
A diffuse or multifocal proliferation of uniform nevoid polygonal cells in the leptomeninges. Cells may spread into the Virchow-Robin spaces without frank invasion of the brain. Diffuse melanocytosis carries a poor prognosis even in the absence of histologic malignancy. (WHO)
This condition has no sub-types.