title: [Letter: Single ulcer of the rectum].
mesh_terms: D000293:Adolescent; D006511:Hepatitis B Antigens; D006801:Humans; D008297:Male; D012002:Rectal Diseases / Q000209:etiology* / Q000628:therapy; D014456:Ulcer / Q000209:etiology* / Q000628:therapy
chemical_list: D006511:Hepatitis B Antigens
vernacular_title: Ulcère solitaire du rectum.