Clinical Characterization of Thin Bone Overlying the Superior Semicircular Canal

Superior semicircular canal dehiscence (SSCD) is a rare disorder that causes vestibular and auditory symptoms resulting from a dehiscence in the middle cranial fossa floor overlying the superior semicircular canal (SSC). The symptoms that result from this include vertigo, autophony, hearing loss, hearing distortion, ear fullness, and tinnitus. It has been found that patients with thinning of the bone overlying the canal without true dehiscence can also experience these symptoms, but there has not been much work done yet to characterize thin bone patients' presentation. It is therefore important to establish diagnostic criteria for classifying thin bone patients and study what symptoms these patients present with.