MAF (Mutation Annotation Format)
A Mutation Annotation Format (MAF) file (.maf) is a tab-delimited text file that lists mutations. MAF files report somatic mutations and SNPs. The specification of the format is described at the The Cancer Genome Atlas (TCGA) Web site: https://wiki.nci.nih.gov/display/TCGA/Mutation+Annotation+Format+%28MAF%29+Specification.
Note: as of version 2.3.3 both .maf and .maf.annotated extensions are valid for this format.