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Perilymphatic Fistula

Perilymphatic fistula is a tear in one or both of the thin membranes that separate the air-filled middle ear from the fluid-filled perilymphatic space of the inner ear, resulting in leakage of microscopic amounts of fluid into the middle ear. This condition is due to sudden changes in middle ear pressure which directly affect the inner ear, the most common causes being head trauma, ear trauma from objects perforating the eardrum, and sudden descent of an airplane or the aftermath of a scuba dive.

Perilymphatic fistula is extremely difficult to diagnose. Treatment may involve surgical repair of the tear of the membrane through which fluid is leaking.

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