Diagnosis of Acoustic Tumor -Especially Diagnostic Problems on Various Atypical Cases

Abstract

A study on the diagnosis of acoustic tumor was conducted, with special attention directed toward atypical cases. The following features were found to be associated with atypical cases of acoustic tumor. Patients with atypical subjective symptoms present with early symptoms or chief complaints which are atypical. Patients with atypical clinical signs may present with normal hearing, no abnormal findings in X-ray studies of the internal auditory meatus, normal caloric response on the affected side etc. Patients with atypical course may present with acute or fluctuating course. Some patients have other diseases, such as chronic otitis media and Meniere's disease.