![]() Factors considered in therapeutic planning of a CF management usually include preoperative hearing status and disease extension (as documented by imaging) 9. An unrecognised CF represents a challenging situation during surgery, as inadvertent manipulation of the fistula is commonly associated with profound sensorineural hearing loss or dead ear 1. High resolution CT scan (HRCT) is a reliable imaging procedure for diagnosis of CF, which typically appears as an erosion of the dense bone of the promontory 3, 6. Severe or profound sensorineural hearing loss (SNHL) is a frequent finding, but hearing examination can show a normal bony threshold as well. Preoperative clinical diagnosis of CF may be difficult as there are no specific audiological or otologic signs and symptoms 4. For this reason, there are only few papers (excluding single case reports) focusing exclusively on CF 7, 8. Cochlear involvement is a rare finding and cochlear fistula (CF) is usually associated with extensive middle ear cholesteatoma association with non-cholesteatomatous-COM is an even rarer entity 4-6. The entire labyrinth can potentially be involved with the lateral semicircular canal as the most frequent site 3. It consists in a defect of the bony labyrinth, resulting in a direct contact between the cholesteatoma matrix and the labyrinthine endosteum or the membranous labyrinth 1, 2. Labyrinthine fistula is one of the most common complications of cholesteatomatous-COM.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |