The Journal of International
Advanced Otology
Clinical Report

Epineurial Pseudocyst of the Intratemporal Facial Nerve: A Case Series Study


Department of Otorhinolaryngology, Head and Neck Surgery, Sint-Lucas Hospital, Ghent, Belgium


Department of Radiology, Sint-Lucas Hospital, Ghent, Belgium


Department of Diagnostic Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium

J Int Adv Otol 2020; 16: 266-270
DOI: 10.5152/iao.2020.8543
Read: 1452 Downloads: 799 Published: 28 July 2020

OBJECTIVES: The goal of this case series was to describe the clinical and radiological characteristics of epineurial pseudocysts of the intratemporal facial nerve (EPIFs) and to discuss the relevance in clinical practice.

MATERIALS and METHODS: A retrospective case series of 10 consecutive patients with EPIFs identified through computed tomography (CT), between 2009 and 2018. Morphological characteristics, coexisting pathology, facial nerve function, and evolution over time were analyzed.

RESULTS: A unilateral EPIF was found in 5 patients (50%) and a bilateral EPIF was found in the other 5 (50%). The largest dimensions were observed in the coronal plane, with an average craniocaudal length of 6.0 mm (range, 3–9 mm). None of the patients presented with facial nerve dysfunction. Growth could not be observed in any of the patients. In 5 cases (33.3%), CT imaging showed a reduced transmastoid access to the facial recess caused by the EPIF.

CONCLUSION: All EPIFs in this study were incidental findings. Facial nerve function was normal in all patients. Knowledge of EPIFs is important to perform safe cholesteatoma and cochlear implant surgery and to prevent unnecessary follow-up imaging.

Cite this article as: Delrue S, Cammaert T, Heylbroeck P, Lemmerling M. Epineurial Pseudocyst of the Intratemporal Facial Nerve: A Case Series Study. J Int Adv Otol 2020; 16(2): 266-70.

EISSN 2148-3817