perilymphatic fistula


Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.
Related to perilymphatic fistula: Perilymph fistula, labyrinthine concussion

perilymphatic fistula

a fistula between the vestibule of the inner ear and the middle ear through which perilymph can leak, resulting in auditory and vestibular disturbances; common sites for perilymphatic fistula are through or around the oval window including through or around the footplate of the stapes or through the round window through the round window membrane.

per·i·lym·phat·ic fis·tu·la

(per'i-lim-fat'ik fis'chū-lă)
A fistula between the vestibule of the inner ear and the middle ear through which perilymph can leak, resulting in auditory and vestibular disturbances; common sites for perilymphatic fistula are the oval window through or around the footplate of the stapes or the round window through the round window membrane.

perilymphatic fistula

A canal through which inner ear fluid may leak into the middle ear that may produce sudden hearing loss, tinnitus, or vertigo. The lesion, which can arise congenitally, after trauma, or by erosion, is one of the few examples of sensorineural hearing loss that can be repaired with surgery to the cochlear aqueduct.
See also: fistula
References in periodicals archive ?
Pneumolabyrinth resulting from perilymphatic fistula has also been associated with barotrauma, iatrogenic injury, head trauma, and chronic ear disease; it can also develop spontaneously.
Middle ear exploration revealed that clear fluid was emanating from the round window niche in a manner consistent with the presence of a perilymphatic fistula.
Perilymphatic fistula has been an enigma for some time.
In cases of possible perilymphatic fistula, CT occasionally provides insight into the possible anatomic defect and offers supportive data toward the diagnosis.