INTRODUCTION
Labyrinthine fistulas (LFs) are
formed from the erosion of the bony labyrinth and occur as a
complication in 2.7-21% (1, 2) of cholesteatomas.
Early identification of LFs allows better surgical planning to reduce
potential vestibulocochlear sequelae. While intraoperative diagnosis of
LFs occurs with clear visualisation of semicircular canal (SCC) fistula,
high-resolution CT (HRCT) temporal bone scans are currently mainstay
investigation preoperatively, with sensitivity of 53.8-100% (3, 4) and
specificity of 90-100% (3, 5).
Surgical management of LFs varies. Matrix may be left over the fistula
and the mastoid cavity exteriorised to prevent complications such as
sensorineural hearing loss and vertigo. Alternatively, matrix may be
completely removed and the fistula repaired.