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• W2053502509 abstract "BACKGROUND AND IMPORTANCE: Contrast extravasation on computed tomography angiography (CTA) is becoming more common, with increasing use of CTA for myriad intracranial vascular pathologies. This article describes the first 2 documented cases of contrast extravasation from a nonaneurysmal basilar artery source seen on CTA and discusses possible pathophysiologic mechanisms. CLINICAL PRESENTATION: We present 2 cases of diffuse atraumatic subarachnoid hemorrhage in which the CTA showed an abnormality in association with the basilar artery highly suggestive of a ruptured aneurysm. Follow-up digital subtraction angiography, however, was completely negative. Subsequent repeat digital subtraction angiography failed to reveal a vascular lesion. Both patients were treated for complications associated with SAH, but given the negative digital subtraction angiography, no intervention was performed. CONCLUSION: Because of the frequent use of CTA, contrast extravasation is an increasingly common observation. Physicians should be aware that basilar artery extravasation can mimic the appearance of an aneurysm. ABBREVIATIONS: CTA, computed tomographic angiography SAH, subarachnoid hemorrhage" @default.
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• W2053502509 date "2012-11-01" @default.
• W2053502509 modified "2023-09-26" @default.
• W2053502509 title "Contrast Extravasation on Computed Tomographic Angiography Mimicking a Basilar Artery Aneurysm in Angiogram-Negative Subarachnoid Hemorrhage" @default.
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• W2053502509 doi "https://doi.org/10.1227/neu.0b013e318268fecb" @default.
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