• Neuroimaging Clin. N. Am. · May 2021

    Review

    Subarachnoid Hemorrhage of Unknown Cause: Distribution and Role of Imaging.

    • Anthony S Larson and Waleed Brinjikji.
    • Department of Radiology, Mayo Clinic, 200 First Street Southwest, Rochester, MN 55905, USA. Electronic address: lars4689@umn.edu.
    • Neuroimaging Clin. N. Am. 2021 May 1; 31 (2): 167-175.

    AbstractSubarachnoid hemorrhage of unknown cause represents approximately 10% to 15% of nontraumatic subarachnoid hemorrhages. The key factors in determining the management strategy for a presumed nonaneurysmal subarachnoid hemorrhage are the distribution, location, and amount of subarachnoid blood. Hemorrhage distribution on computed tomography can be categorized as follows: perimesencephalic, diffuse, sulcal, and primary intraventricular. The extent of the workup required in determining the cause of hemorrhage depends on the distribution of blood. The authors review the potential causes, differential diagnoses, and acute and long-term follow-up strategies in patients with subarachnoid hemorrhage of unknown cause.Copyright © 2021 Elsevier Inc. All rights reserved.

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