Dissecting Aneurysm of Vertebral Artery Manifestating as Contralateral Abducens Nerve Palsy.
10.3340/jkns.2013.53.3.194
- Author:
Jin Sue JEON
1
;
Sang Hyung LEE
;
Young Je SON
;
Young Seob CHUNG
Author Information
1. Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.
- Publication Type:Case Report
- Keywords:
Vertebra artery;
Subarachnoid hemorrhage;
Abducens nerve paralysis
- MeSH:
Abducens Nerve;
Abducens Nerve Diseases;
Aneurysm;
Aneurysm, Dissecting;
Angiography;
Arteries;
Brain Stem;
Cerebral Angiography;
Diffusion;
Dilatation;
Diplopia;
Follow-Up Studies;
Headache;
Hemorrhage;
Humans;
Magnetic Resonance Angiography;
Magnetic Resonance Imaging;
Muscle Rigidity;
Neurologic Examination;
Neurologic Manifestations;
Paresis;
Subarachnoid Hemorrhage;
Vertebral Artery
- From:Journal of Korean Neurosurgical Society
2013;53(3):194-196
- CountryRepublic of Korea
- Language:English
-
Abstract:
Isolated abducens nerve paresis related to ruptured vertebral artery (VA) aneurysm is rare. It usually occurs bilaterally or ipsilaterally to the pathologic lesions. We report the case of a contralateral sixth nerve palsy following ruptured dissecting VA aneurysm. A 38-year-old man was admitted for the evaluation of a 6-day history of headache. Abnormalities were not seen on initial computed tomography (CT). On admission, the patient was alert and no signs reflecting neurologic deficits were noted. Time of flight magnetic resonance angiography revealed a fusiform dilatation of the right VA involving origin of the posterior inferior cerebellar artery. The patient suddenly suffered from severe headache with diplopia the day before the scheduled cerebral angiography. Neurologic examination disclosed nuchal rigidity and isolated left abducens nerve palsy. Emergent CT scan showed high density in the basal and prepontine cistern compatible with ruptured aneurismal hemorrhage. Right vertebral angiography illustrated a right VA dissecting aneurysm with prominent displaced vertebrobasilar artery to inferiorly on left side. Double-stent placement was conducted for the treatment of ruptured dissecting VA aneurysm. No diffusion restriction signals were observed in follow-up magnetic resonance imaging of the brain stem. Eleven weeks later, full recovery of left sixth nerve palsy was documented photographically. In conclusion, isolated contralateral abducens nerve palsy associated with ruptured VA aneurysm may develop due to direct nerve compression by displaced verterobasilar artery triggered by primary thick clot in the prepontine cistern.
