title: Syphilitic proctitis in a homosexual.
mesh_terms: D000328:Adult; D001706:Biopsy; D005455:Fluorescent Antibody Technique; D006716:Homosexuality; D006801:Humans; D008297:Male; D010502:Perineum; D011349:Proctitis / Q000209:etiology*; D011351:Proctoscopy; D012007:Rectum / Q000473:pathology; D013587:Syphilis / Q000175:diagnosis*; D013588:Syphilis Serodiagnosis; D014210:Treponema pallidum / Q000276:immunology; D014456:Ulcer / Q000175:diagnosis