JCN
ORIGINAL ARTICLE
Open Access
pISSN 1738-6586 / eISSN 2005-5013 / J Clin Neurol 2016;12(1):65-74 / http://dx.doi.org/10.3988/jcn.2016.12.1.65
Bilaterally Abnormal Head Impulse Tests Indicate a Large Cerebellopontine Angle Tumor Hyo-Jung Kima* Seong-Ho Parkb* Ji-Soo Kimb Ja Won Kooc Chae-Yong Kimd Young-Hoon Kimd Jung Ho Hand epartment of Biomedical Laboratory D Science, Kyungdong University, Goseong, Korea b Departments of Neurology, c Otolaryngology, and dNeurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea a
Background and PurposezzTumors involving the cerebellopontine angle (CPA) pose a diagnostic challenge due to their diverse manifestations. Head impulse tests (HITs) have been used to evaluate vestibular function, but few studies have explored the head impulse gain of the vestibulo-ocular reflex (VOR) in patients with a vestibular schwannoma. This study tested whether the head impulse gain of the VOR is an indicator of the size of a unilateral CPA tumor. MethodszzTwenty-eight patients (21 women; age=64±12 years, mean±SD) with a unilateral CPA tumor underwent a recording of the HITs using a magnetic search coil technique. Patients were classified into non-compressing (T1–T3) and compressing (T4) groups according to the Hannover classification.
ResultszzMost (23/28, 82%) of the patients showed abnormal HITs for the semicircular canals on the lesion side. The bilateral abnormality in HITs was more common in the compressing group than the non-compressing group (80% vs. 8%, Pearson’s chi-square test: p
ORIGINAL ARTICLE
Open Access
pISSN 1738-6586 / eISSN 2005-5013 / J Clin Neurol 2016;12(1):65-74 / http://dx.doi.org/10.3988/jcn.2016.12.1.65
Bilaterally Abnormal Head Impulse Tests Indicate a Large Cerebellopontine Angle Tumor Hyo-Jung Kima* Seong-Ho Parkb* Ji-Soo Kimb Ja Won Kooc Chae-Yong Kimd Young-Hoon Kimd Jung Ho Hand epartment of Biomedical Laboratory D Science, Kyungdong University, Goseong, Korea b Departments of Neurology, c Otolaryngology, and dNeurosurgery, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea a
Background and PurposezzTumors involving the cerebellopontine angle (CPA) pose a diagnostic challenge due to their diverse manifestations. Head impulse tests (HITs) have been used to evaluate vestibular function, but few studies have explored the head impulse gain of the vestibulo-ocular reflex (VOR) in patients with a vestibular schwannoma. This study tested whether the head impulse gain of the VOR is an indicator of the size of a unilateral CPA tumor. MethodszzTwenty-eight patients (21 women; age=64±12 years, mean±SD) with a unilateral CPA tumor underwent a recording of the HITs using a magnetic search coil technique. Patients were classified into non-compressing (T1–T3) and compressing (T4) groups according to the Hannover classification.
ResultszzMost (23/28, 82%) of the patients showed abnormal HITs for the semicircular canals on the lesion side. The bilateral abnormality in HITs was more common in the compressing group than the non-compressing group (80% vs. 8%, Pearson’s chi-square test: p
![[A rare tumor of the cerebellopontine angle].](/assets/img/hold.png)
