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Cochlear implant electrode array misplaced in Hyrtl's fissure
Amina Mouzali1, Kheiredidine Ouennoughi, Mohamed-Salah Haraoubia
1Department of Otorhinolaryngology Head & Neck Surgery, Beni Messous Universitary Hospital, Alger 1600, Algeria.
International Journal of Pediatric Otorhinolaryngology
|September 13, 2011
Summary
A rare temporal bone malformation, Hyrtl's fissure, can cause cochlear implant misplacement. Postoperative diagnosis in an 8-year-old boy highlights the need for advanced imaging and intraoperative monitoring.
Area of Science:
- Otolaryngology
- Neurosurgery
- Radiology
Background:
- Hyrtl's fissure is a rare congenital temporal bone cleft.
- It can lead to cerebrospinal fluid fistulas.
- Complications with cochlear implant surgery are infrequently reported.
Observation:
- An 8-year-old boy experienced cochlear implant failure due to electrode misplacement.
- The electrode array was located in Hyrtl's fissure, an extracochlear position.
- Diagnosis was confirmed postoperatively via computed tomography (CT).
Findings:
- Persistent Hyrtl's fissure is a rare temporal bone malformation.
- This case demonstrates electrode misplacement into Hyrtl's fissure.
- Non-auditory responses indicated cochlear implant failure.
Implications:
- Highlights the risk of cochlear implant misplacement in patients with Hyrtl's fissure.
- Emphasizes the importance of pre-operative CT and MRI for detecting temporal bone abnormalities.
- Underscores the value of intraoperative telemetry and postoperative imaging for accurate diagnosis.
