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KMID : 1001920030340010057
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Journal of Korean Neurosurgical Society
2003 Volume.34 No. 1 p.57 ~ p.60
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Medical Trunk Aneurysm of the Distal Posterior Inferior Cerebellar Artery in the Fourth Ventricle
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Ahn Jung-Yong
Chung Young-Sun
Kim Ok-Jun
Choi Sung-Wook
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Abstract
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We present a case of a raptured aneurysm of the medial trunk of the right posterior inferior cerebellar artery (PICA) in the fourth ventricle. A 52-year-old man presented with sudden onset of headache, followed by an abrupt decline in consciousness. Angiographic studies revealed that the aneurysm arose from the medial trunk of the right PICA, distal to the choroidal point and associated with the stenosis of the basilar artery and the hypoplasia of the right anterior inferior cerebellar artery and superior cerebellar artery. The patient underwent a midline suboc:cipital craniotomy and aneunismectomy after clipping of the parent artery. A postoperative angiogram confirmed complete obliteration of the aneurysm, but demonstrated occlusion of the vermian branch of the right PICA. The pathogenesis of this lesion could be due to hemodynamic stress.
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KEYWORD
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Fourth ventricle, Intracranial aneurysm, Posterior inferior cerebellar artery
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