Traumatic incudostapedial joint dislocation with stapes footplate into the vestibular window and pneumolabyrinth: a case report

A case of traumatic incudostapedial joint dislocation with stapes footplate into the vestibular window and pneumolabyrinth patient history. Patients mainly presented with vertigo, hearing loss in the left ear, audible sound when the head was shifted to the left, and subsequent vertigo, manifested as a spiral rotation, accompanied by gait instability, a feeling of stepping on cotton, and decreased attention. Pure tone audiometry showed mixed hearing loss in the left ear and temporal bone CT demonstrated air density in the left vestibule. Then, the patient underwent exploratory tympanotomy, which found the incudostapedial joint dislocation and stapes footplate into the vestibular window. According to the patient's history of head trauma, temporal bone CT, and exploratory tympanotomy can be diagnosed as: pneumolabyrinth, traumatic ossicular injury.