RT Journal Article SR Electronic T1 Pneumolabyrinth: a rare complication of stapes surgery JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e232190 DO 10.1136/bcr-2019-232190 VO 12 IS 11 A1 Patricia S Gomes A1 Sergio Caselhos A1 Ana Teresa Vide A1 Rui Fonseca YR 2019 UL http://casereports.bmj.com/content/12/11/e232190.abstract AB Pneumolabyrinth is the entrapment of air within the inner ear and is a rare complication of stapes surgery. We report the case of a patient submitted to stapedectomy who, 4 weeks later, suddenly developed right hearing loss, ipsilateral tinnitus and vertigo. On the physical examination, the patient showed no signs of vestibular deficits. Audiometry was compatible with right profound mixed hearing loss and high-resolution CT of the temporal bone revealed the presence of pneumolabyrinth. During exploratory tympanotomy, the prosthesis was found dislodged; the communication between the middle and inner ear was closed with vein graft and a new prosthesis was placed. Following surgery, vestibular symptoms was abolished and the patient experienced great improvement of the hearing thresholds.