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J Korean Neurosurg Soc. 2007 May;41(5):340-342. English. Case Report.
Chong JY , Yi HJ , Kim KM , Lee SR .
Department of Neurosurgery, Hanyang University Medical Center, Seoul, Korea.
Department of Neuroradiology, Hanyang University Medical Center, Seoul, Korea.

Three-dimensional computed tomographic angiography (CTA), a representative noninvasive radiologic technique, is being widely used for detecting vascular lesions in specific intracranial bleeding under a certain circumstance (acute nontraumatic subarachnoid hemorrhage). We encountered a case of extravasation of the contrast medium on CTA images that appeared as ribbon-like high-attenuation lesion from an aneurysm at the distal anterior choroidal artery in a young adult moyamoya patient. As CTA is used more frequently, it is imperative to understand such unusual but, potentially lethal image findings to conduct a prompt intervention.

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