NRAS and melanoma: A study of the TCGA database divided melanomas into four genomic subtypes: BRAF mutated (more common in younger patients, associated with intermittent sun exposure), NRAS mutated (more common in older patients, associated with chronic UV damage), NFI mutated (present in acral and mucosal melanomas, associated with chronic UV damage), and triple wild type (lacking a UV signature, including uveal melanoma) [84].