Hagos Biluts Mersha, Tigist Kebebew, Tequam Debebe


Background: Cerebellopontine angle (CPA) masses are the most common neoplasm in the posterior fossa, accounting for 5%-10% of intracranial tumors.

Objective: The objective of this study was to describe the imaging feature, identify the prevalence of the various CPA masses, and determine the diagnostic accuracy of computedtomography and magnetic resonance imaging in the evaluation of CPA masses.

Methods: Five-years cross sectional descriptive study was done at Tikur Anbessa Specialized Hospital and Myungsung Christian MedicalCenter between January 2011 and December 2015. Thirty-Eight patients with CPA masses on computedtomography and/ormagnetic resonance imaging that were surgically treated and histopathological proven were selected. Patients’ demographic data, diagnosis on admission, clinical manifestations, computedtomography/ magnetic resonance imaging features and diagnosis, and histologic diagnostic results were collected using structured questionnaire. Data entry and analysis were carried out using SPSS Version 20.0.

Results: A total of 58 patients underwent surgery for CPA masses, of which 38 had brain computedtomography/magnetic resonance imagingand biopsy proven diagnosis. The highest number of cerebellopontine anglemasses was found in the age group between 31 and 40 years. Equal sex distribution was observed. The most common clinical presentation was headache. Most masses were multiple and right-sided. Order of frequency of CPA mass was vestibular schwannoma followed by meningioma and epidermoid cyst.

Conclusion: The most common CPA mass was vestibular schwannoma followed by meningioma and epidermoid cyst. Magnetic resonance imaging is more sensitive and more specific in diagnosing cerebellopontine anglemass than computedtomography scan.


Key words: Cerebellopontine, Mass, Schwannoma, tomography, magnetic resonance, Ethiopia


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