Facial Canal Defect During Mastoidectomy for Chronic Suppurative Otitis Media
Iraqi Postgraduate Medical Journal,
2021, Volume 20, Issue 4, Pages 227-331
The facial nerve is characterized by the long bony canal that makes it vulnerable to injury during otologic surgery. Facial canal defect could be found as an anatomic variant or due to longstanding inflammation that causes bone erosion.
AIMS OF THE STUDY:
Determination of the incidence and location of facial canal defect and identification of association between facial canal defect and other intraoperative pathological findings.
PATIENTS AND METHODS:
A case series study of eighty-four patients with chronic suppurative otitis media who underwent mastoidectomy in Al-Yarmouk Teaching Hospital through a period from October 2017 till October 2018. Data were collected regarding the intraoperative finding of facial canal defect, its location and associated pathological findings which include lateral semicircular canal erosion, dural exposure and ossicular erosion.
This study included (38) males and (46) females, their ages ranged from five to fifty-eight years. The incidence of facial canal defects was (20.2%). The tympanic segment was predominantly involved (82.4%).There was a statistically significant correlation between facial canal defect and lateral semicircular canal erosion (p<0.006).
The incidence of facial canal defect was 20.2%, mostly located in the tympanic segment. The presence of lateral semicircular canal erosion was significantly correlated with facial canal defects.
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