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Updated: May 14, 2026

Endoscopic Cholesteatoma Surgery
Published on: January 19, 2022
Lipochoristoma of the internal auditory canal
B De Diego1, A Trinidad, A Ibáñez
1Department of Otorhinolaryngology, H. U. Puerta de Hierro-Majadahonda, Madrid, Spain. beatrizdediego@yahoo.es
Problem:
Approximately 90% of tumours of cerebellopontine angle and internal auditory canal are vestibular schwannomas (acoustic neuromas) and meningiomas. Lipochoristomas are rare benign masses that represent only 0.15% of cases.
Methodology:
We report the case of a 39-year-old man who consulted us for right-sided hearing loss and tinnitus.
Results:
Tonal audiometry showed a down-sloping right sensorineural hearing loss in frequencies above 2000 Hz. Magnetic resonance imaging (MRI) revealed a heterogeneous lesion in the right internal auditory canal with areas of hyperintensity on noncontrast T1-weighted MRI and suppression of much of the signal of the lesion with persistence of some areas of enhancement on T1-weighted fat-suppressed images.
Conclusion:
Correct imaging diagnosis through MRI (high signal intensity on noncontrast T1-weighted images together with a missing signal in fat suppression sequences) is essential in order to avoid unnecessary surgery or radiation therapy, which are not recommended in the treatment of these lesions.
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