Diffuse Melanocytosis

Source:http://linkedlifedata.com/resource/umls/id/C1266112

NCI: 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)

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