Melanosis linguae.
D006801:Humans; D008548:Melanosis / Q000209:etiology / Q000473:pathology*; D009539:Nicotinic Acids / Q000378:metabolism; D012257:Riboflavin Deficiency / Q000150:complications; D014060:Tongue Diseases / Q000473:pathology*
D009539:Nicotinic Acids