Title:
Lipochoristoma of the internal auditory canal
Authors:
B. De Diego*, A. Trinidad*, A. Ibáñez*, G. Saucedo**, J. Vicente*, F. M González* and R. Ramírez-Camacho*
Institutions:
*Department of Otorhinolaryngology, **Department of Radiology, H. U. Puerta de Hierro-Majadahonda, Madrid, Spain
Keywords:
Lipochoristoma; choristoma; internal auditory canal mass; magnetic resonance imaging
Pages:
295 - 297
Abstract:
Lipochoristoma of the internal auditory canal. 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.
Issue:
Vol. 8, 2012, 4th trimester


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Lipochoristoma of the internal auditory canal