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When the Jugular Bulb Contacts the Facial Nerve
Mugurel Constantin Rusu1, Corneliu Toader2, Răzvan Costin Tudose1
1Department 1, Division of Anatomy, Faculty of Dentistry, "Carol Davila" University of Medicine and Pharmacy.
The Journal of Craniofacial Surgery
|November 4, 2024
Summary
A rare finding of the high jugular bulb (HJB) directly contacting the facial nerve (FN) was observed in 5% of CT scans. This HJB-FN contact, though scarce, has implications for surgical procedures.
Area of Science:
- Otorhinolaryngology
- Neuroanatomy
- Medical Imaging
Background:
- Dehiscences of the intrapetrous facial nerve (FN) canal and high jugular bulb (HJB) are documented.
- A common dehiscent osseous wall between the HJB and FN is a rare anatomical finding.
Purpose of the Study:
- To investigate the incidence of a common dehiscent osseous wall between the HJB and FN.
- To analyze this peculiar intrapetrous morphology using computed tomograms (CTs).
Main Methods:
- Retrospective analysis of 60 archived computed tomograms (CTs).
- Evaluation of high jugular bulb (HJB) and facial nerve (FN) anatomical variations and dehiscences.
Main Results:
- High jugular bulbs (HJBs) were present in 71.67% of cases (unilateral 51.67%, bilateral 20%).
- Direct contact between the HJB and facial nerve (FN) occurred in 5% of cases.
- Dehiscences of the HJB to the retrotympanum or posterior cranial fossa were noted.
Conclusions:
- The incidence of HJB-FN contact may be higher than previously reported.
- This rare anatomical variation necessitates documentation due to potential clinical symptoms and surgical implications.
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