Auditory brainstemresposes in patients with acoustic neuromas

Abstract

In 21 patients with surgically proven acoustic neuromas, auditory brainstem responses (ABR) were recorded, and the diagnostic value of ABR for detecting acoustic neuromas was evaluated.
The ABR criteria were (1) wave V latency, (2) the latency delay between waves I and V (I-Vd), (3) interaural wave V latency difference (IT5) Diagnosis was confirmed in 86%.
IT5 and I-Vd were approximately proportional to the size of the tumor. Thees, false negative examinations may be encountered in cases of small acoustic neuromas.