Large Congenital Melanocytic Nevus, also known as giant congenital melanocytic nevus, is related to melanocytic nevus syndrome, congenital and nevus, epidermal. An important gene associated with Large Congenital Melanocytic Nevus is NRAS (NRAS Proto-Oncogene, GTPase), and among its related pathways/superpathways are ERK Signaling and Prolactin Signaling. Affiliated tissues include skin and spinal cord, and related phenotypes are nevus and abnormality of skin pigmentation