<prompt> Most Common site of perilymph fistula isRound windowOval windowOtic capsuleAttic  <response>: In this condition perilymph leaks into the middle ear. Footplate of stapes is fixed on oval window. It can occur as a complication of stapedectomy, or ear surgery when stapes is dislocated, and also from sudden pressure change in the middle ear. Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition 