Journal of Clinical Otolaryngology Head and Neck Surgery
The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery
원저

청신경종양에서 나타나는 청성뇌간반응 잠복기의 진단적 가치

박시영1, 신중욱1,*, 최정환2
See-Young Park1, Joong-Wook Shin1,*, Jeong-Hwan Choi2
1인제대학교 의과대학 일산백병원 이비인후과학교실
2인제대학교 의과대학 상계백병원 이비인후과학교실
1Department of Otorhinolaryngology-Head and Neck Surgery, InJe University, College of Medicine, Ilsan Paik Hospital, Goyang, Korea
2Department of Otorhinolaryngology-Head and Neck Surgery, InJe University, College of Medicine, Sanggye Paik Hospital, Seoul, Korea
*교신저자: 신중욱, 411-706 경기도 고양시 일산구 대화동 2240 인제대학교 의과대학 일산백병원 이비인후과학교실 전화:(031) 910-7250·전송:(031) 910-7747· E-mail: i0223@paik.ac.kr

© Copyright 2010 The Busan, Ulsan, Gyeoungnam Branch of Korean Society of Otolaryngology-Head and Neck Surgery. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Feb 11, 2010; Revised: Mar 05, 2010; Accepted: Apr 02, 2010

Published Online: May 31, 2020

ABSTRACT

Background and Objectives: It is important to rule out acoustic neuroma when treating patients who have tinnitus or monaural hearing loss. The most accurate diagnostic tool is MRI but due to high costs, auditoiy brainstem response (ABR) latency is often used. The aim of this study is to confirm the diagnostic value of ABR latency in acoustic neuroma. Patients and Methods: The medical records of 20 patients who were diagnosed acoustic neuroma in MRI and evaluated with pure tone audiometry, speech audiometry and ABR were retrospectively reviewed from January, 2003 to January, 2010. Tumor size and hearing classification system of 2003 Consensus Meeting was used. Using I-V interpeak latency (IPL) and I-V interlatency difference (ILD) , we identified the diagnostic value of ABR latency in diagnosing acoustic neuroma. Results: Among 20 patients, there were 2 cases of intra-meatal tumor, 2 cases of grade 1, 6 cases of grade 2, 6 cases of grade 3, 2 cases of grade 4 and 2 cases of grade 5 according to the acoustic neuroma classification system of 2003 Consensus Meeting. There were 9 cases with no wave in ABR. 4 cases showed over 4.4 msec in I-V IPL and 6 cases showed over 0.2 msec in I-V ILD. There were 3 cases that showed over 4.4 msec in I-V IPL and over 0.2 msec in I-V ILD. Therefore, there were 16 cases that showed abnormal reactions to ABR among acoustic neuroma patients, false negative rate was founded to 20%. Conclusion: The smaller tumor size, the better prognosis in treating tumor and preserving hearing and facial nerve function, so that early diagnosis of acoustic neuroma is important. Because false negative rate of ABR was 20% in this study, using ABR as screening test of acoustic neuroma needs attention. (J Clinical Otolaryngol 2010; 21:46–49)

Keywords: 청신경종양; 뇌간유발반응검사
Keywords: Acoustic neuroma; Auditory brainstem response