Spectrum of Third Window Abnormalities: Semicircular Canal Dehiscence and Beyond.

Spectrum of Third Window Abnormalities: Semicircular Canal Dehiscence and Beyond.

AJNR Am J Neuroradiol. 2016 Aug 25;

Authors: Ho ML, Moonis G, Halpin CF, Curtin HD

Abstract
Third window abnormalities are defects in the integrity of the bony structure of the inner ear, classically producing sound-/pressure-induced vertigo (Tullio and Hennebert signs) and/or a low-frequency air-bone gap by audiometry. Specific anatomic defects include semicircular canal dehiscence, perilabyrinthine fistula, enlarged vestibular aqueduct, dehiscence of the scala vestibuli side of the cochlea, X-linked stapes gusher, and bone dyscrasias. We discuss these various entities and provide key examples from our institutional teaching file with a discussion of symptomatology, temporal bone CT, audiometry, and vestibular-evoked myogenic potentials.

PMID: 27561833 [PubMed - as supplied by publisher]

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