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.
Overview of Superior Canal Dehiscence
The superior semicircular canal has a bony cap over it that is sometimes very thin. This cap can be nonexistent in focal areas of the superior semicircular canal. In this situation, the tough covering (dura) that protects the temporal lobe can make contact with the inner membranes of this canal.
A small area of the bony covering of the superior semicircular canal is eroded and is exposed to the dura (shown in blue), which is the tough covering of the brain.
A small area of the bony covering of the superior semicircular canal is eroded and is exposed to the dura (shown in blue), which is the tough covering of the brain.
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About Dr. Prasad
Dr. Sanjay Prasad MD FACS is a board certified physician and surgeon with over thirty-two years of sub-specialty experience in Otology, Neurotology, advanced head and neck oncologic surgery, and cranial base surgery. He is chief surgeon and founder of the private practice, Metropolitan NeuroEar Group, located in the metropolitan Washington D.C. area.