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