Superior Canal Dehiscence

Superior Canal Dehiscence is when the bony cap over the superior semicircular canal has eroded away and the tough covering (dura) that protects the temporal lobe can make contact with the inner membranes of this canal causing disequilibrium.

Complications for Superior Canal Dehiscence

Several different types of symptoms are attributable to this condition:

  • Conductive hearing loss of undetermined cause.
  • Disequilibrium or vertigo associated with straining, sneezing, or coughing.
  • Loud noises causing disequilibrium