Unusual lesions of the internal auditory canal

• Published in: The American journal of otology (New York, N.Y.) Vol. 17; no. 1; pp. 143 - 149
• Main Authors: BOHRER, P. S, CHOLE, R. A
• Format: Journal Article
• Language: English
• Published: Hagerstown, MD Lippincott 1996
• Subjects: Adolescent; Aged; Arachnoid Cysts - physiopathology; Biological and medical sciences; Brain - physiopathology; Cerebellar Neoplasms - pathology; Cerebellar Neoplasms - surgery; Cerebellopontine Angle - pathology; Cerebellopontine Angle - surgery; Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology; Ear, Inner - physiopathology; Female; Hearing Loss, Bilateral - etiology; Hearing Loss, Bilateral - physiopathology; Hemangioma - pathology; Hemangioma - surgery; Humans; Lipoma - pathology; Lipoma - surgery; Magnetic Resonance Imaging; Male; Medical sciences; Meningioma - pathology; Meningioma - surgery; Middle Aged; Otorhinolaryngology. Stomatology; Tumors; Human; Nervous system diseases; Ear disease; Arachnoidal cyst; Cardiovascular disease; Male; Nuclear magnetic resonance imaging; Differential diagnostic; Vascular disease; Case study; Angioma; Treatment; ENT disease; Female; Benign neoplasm; Internal auditory meatus; Meningioma
• ISSN: 0192-9763

Tumor types other than acoustic neuromas are uncommonly encountered in the cerebellopontine angle, and unusual lesions limited to the internal auditory canal (IAC) are given more rare. We present five patients with unusual tumors of the IAC including two meningiomas, two arachnoid cysts, and a hemangioma. These unusual tumors, and lipomas, are discussed. Particular attention is paid to the pathophysiology of the lesions and treatment recommendations. The differential diagnosis of intracanalicular lesions using magnetic resonance imaging is also presented.