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[Malformations of chorda tympani nerve]
1Department of Otorhinolaryngology, Tongren Hospital, Beijing 100730.
Lin Chuang Er Bi Yan Hou Ke Za Zhi = Journal of Clinical Otorhinolaryngology
|February 5, 2003
Summary
Anomalies of the chorda tympani nerve are common in congenital ear malformations, particularly in atresia. Identifying these nerve variations during surgery is crucial for preventing complications.
Area of Science:
- Anatomy and embryology of the auditory system
- Surgical anatomy of the temporal bone
- Congenital ear malformations
Context:
- The chorda tympani nerve is a branch of the facial nerve, playing a role in taste and salivation.
- Congenital malformations of the external and middle ear often involve complex anatomical variations.
- Understanding these variations is critical for surgical planning and outcomes.
Purpose:
- To characterize the anomalies of the chorda tympani nerve in patients with congenital external-middle ear malformations.
- To determine the incidence and types of chorda tympani nerve anomalies in different malformation groups.
- To highlight the importance of identifying and preserving the chorda tympani nerve during otologic surgery.
Summary:
- Chorda tympani nerve anomalies were identified in 64.91% of 667 cases with congenital external-middle ear malformations.
- The incidence was highest in atresia (100%), followed by stenosis (23.15%) and isolated middle ear malformation (10.88%).
- Observed anomalies included elongation, abnormal positioning, and duplication, with the nerve often found at the atresia plate.
Impact:
- Reveals a high prevalence of chorda tympani nerve anomalies in congenital ear malformations, especially atresia.
- Emphasizes the need for intraoperative identification and protection of the ectopic chorda tympani nerve.
- Informs surgical strategies to minimize nerve injury and improve functional outcomes in reconstructive ear surgery.