title: Positive "fistula sign" with an intact tympanic membrane. Clinical report of three cases and histopathological description of vestibulofibrosis as the probable cause.
mesh_terms: D001299:Audiometry; D007758:Ear, Inner / Q000601:surgery; D004584:Electronystagmography; D006311:Hearing Disorders / Q000209:etiology; D006801:Humans; D007759:Labyrinth Diseases / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008297:Male; D008575:Meniere Disease / Q000473:pathology; D008875:Middle Aged; D009759:Nystagmus, Pathologic / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery; D013199:Stapes / Q000473:pathology; D013201:Stapes Surgery; D013590:Syphilis, Congenital / Q000473:pathology; D000267:Tissue Adhesions / Q000453:epidemiology / Q000209:etiology; D014432:Tympanic Membrane / Q000601:surgery; D014724:Vestibular Function Tests; D014722:Vestibule, Labyrinth / Q000473:pathology*