Abstract
This study retrospectively investigated 15 cases of acoustic tumor (AT) at Saga Medical School Hospital. The results of audiometry, a head X-ray examination, the auditory brainstem response (ABR), the caloric test, magnetic resonance imaging (MRI) and patient symptoms were analyzed in this study. Abnormalities were found in 80% based on the the audiometry findings, in 87% based on the X-ray findings, in 100% based on the auditory brainstem response findings, and in 80% based on the caloric test findings. Both audiometry and the head X-ray examination are thus considered to be suitable as first-line examinations for screening AT. In addition, the ABR, the caloric test and MRI are considered to be useful for making a definitive diagnosis of AT. It is plausible that the rate of positive findings for ABR, audiometry, a head X-ray examination and the caloric test may thus show a correlation with the size of ATs.
