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Journal of Korean Neurosurgical Society 2007;41(5): 340-342.
Extravasation from the Distal Anterior Choroidal Artery Aneurysm in Moyamoya Patient during Computed Tomographic Angiography.
Jong Yun Chong, Hyeong Joong Yi, Kwang Myung Kim, Seung Ro Lee
1Department of Neurosurgery, Hanyang University Medical Center, Seoul, Korea. hjyi8499@hanyang.ac.kr
2Department 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.
Key Words: Aneurysm; Computed tomographic angiography; Distal anterior choroidal artery; Extravasation; Moyamoya disease
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