labyrinthine fistula
fistula perilymphatica latin

Finally, disease conditions-for example cholesteatoma-can result in a labyrinthine fistula.

In November of the same year he used it to operate on a patient with chronic otitis who had a labyrinthine fistula.

A labyrinthine fistula is an abnormal opening in the bony capsule of the inner ear, resulting in leakage of the perilymph from the semicircular canals into the middle ear.