Melanocytic Nevus Syndrome, Congenital, also known as giant pigmented hairy nevus, is related to spitzoid melanoma and nevus, epidermal. An important gene associated with Melanocytic Nevus Syndrome, Congenital is NRAS (NRAS Proto-Oncogene, GTPase), and among its related pathways/superpathways are Development EGFR signaling pathway and Development FGFR signaling pathway. The drugs Aminolevulinic acid and Glycolic acid have been mentioned in the context of this disorder. Affiliated tissues include skin and brain, and related phenotypes are hypertelorism and short nose