A Case of Trochlear Nerve Schwannoma Presenting with Binocular Diplopia. |
Hyun Ju Kee, Yung Ju Yoo, Jae Hyoung Kim, Hee Kyung Yang |
1Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. nan282@snu.ac.kr 2Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea. |
양안 복시로 나타난 도르래신경초종 1예 |
기현주1⋅류영주1⋅김재형2⋅양희경1 |
서울대학교 의과대학 분당서울대학교병원 안과학교실1, 서울대학교 의과대학 분당서울대학교병원 영상의학교실2 |
|
Abstract |
PURPOSE To report a case of unilateral trochlear nerve schwannoma in a patient without neurofibromatosis. CASE SUMMARY: A 58-year-old male presented with acute onset of diplopia which developed 10 days prior. Alternate prism cover test, ductions and versions and Bielschowsky three-step test were compatible with left superior oblique muscle palsy. High-resolution magnetic resonance imaging showed a 6-mm-sized lobulated mass in the cisternal segment of the left trochlear nerve passing lateral to the brainstem. An additional thin-section gadolinium-enhanced orbit magnetic resonance imaging showed definite enhancement in the entire portion of the lobulated mass, compatible with a trochlear nerve schwannoma. Diplopia was managed conservatively with prism glasses and regular follow-up examinations were recommended without further treatment. CONCLUSIONS: A trochlear nerve tumor should be considered in adults who develop diplopia associated with acquired superior oblique muscle palsy. |
Key Words:
Acquired superior oblique muscle palsy;Trochlear nerve schwannoma;Trochlear nerve tumor |
|