What is the prevalence of new-onset benign paroxysmal positional vertigo (BPPV) before and after superior canal dehiscence (SCD) repair?
Bottom Line: New-onset BPPV occurs commonly after SCD repair, but the exact etiology remains unknown. Based on the high percentage of BPPV cases following SCD surgery, a preoperative discussion about postoperative BPPV is warranted.
Explore this issue:September 2016
Background: SCD is a bony defect of the superior semicircular canal (SSC). In some patients, SCD-related symptoms are severe and require surgical repair, resulting in symptom resolution in a high percentage of patients. Disequilibrium may arise, persist, or even worsen during the postoperative period, however. One potential explanation is BPPV onset, believed to be caused by dislodged otoliths that migrate to the semicircular canals, resulting in acute episodic vertigo. To date, the association between SCD repair and BPPV onset has not been described in detail.
Study design: Retrospective chart review at a tertiary care center of 180 patients with a diagnosis of SCD syndrome (SCDS) between January 2002 and May 2015.