Melanosis, Neurocutaneous, also known as neurocutaneous melanocytosis, is related to large congenital melanocytic nevus and scalp syndrome. An important gene associated with Melanosis, Neurocutaneous is NRAS (NRAS Proto-Oncogene, GTPase). The drugs Azelaic acid and Clotrimazole have been mentioned in the context of this disorder. Affiliated tissues include skin and amygdala, and related phenotypes are intellectual disability and seizure