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

  title={Spectrum of Third Window Abnormalities: Semicircular Canal Dehiscence and Beyond.},
  author={Mai-Lan Ho and Gul Moonis and C F Halpin and H D Curtin},
  journal={AJNR. American journal of neuroradiology},
  volume={38 1},
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… CONTINUE READING
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