The tongue: 4. Ulceration.
D004892:Erythema Multiforme / Q000473:pathology; D006801:Humans; D008010:Lichen Planus / Q000473:pathology; D013281:Stomatitis, Aphthous / Q000473:pathology; D014059:Tongue / Q000293:injuries; D014060:Tongue Diseases / Q000209:etiology / Q000473:pathology*; D014062:Tongue Neoplasms / Q000473:pathology; D014456:Ulcer / Q000209:etiology / Q000473:pathology