Perilymphatic fistula has been believed to cause acute, profound and reversible sensory hearing loss. Over the past five years, exploratory tympanotomy were performed in 27 patients with perilymphatic fistula. In three patients, air bubbles came out of the round window niche in the course of perilymphatic leakage. The perilymphatic fistulae observed in these three patients were attributable to ...
