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RT Journal Article
SR Electronic
T1 Spectrum of Third Window Abnormalities: Semicircular Canal Dehiscence and Beyond
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 2
OP 9
DO 10.3174/ajnr.A4922
VO 38
IS 1
A1 Ho, M.-L.
A1 Moonis, G.
A1 Halpin, C.F.
A1 Curtin, H.D.
YR 2017
UL http://www.ajnr.org/content/38/1/2.abstract
AB SUMMARY: 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.EVASenlarged vestibular aqueduct syndromeSSCCDsuperior semicircular canal dehiscence