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Updated: Jul 16, 2026

Point of Care Transcranial Color-Coded Duplex Ultrasound of the Middle Cerebral Artery
Published on: August 9, 2024
The CT pattern of a ruptured P3 posterior cerebral artery aneurysm
Vivien H Lee1, Eelco F M Wijdicks
1Department of Neurology, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA.
Abstract:
A 48-year-old male smoker with a history of significant alcohol use developed thunderclap headache during sexual intercourse. On neurological exam, he was confused and agitated with a Glasgow Coma Score of 11 (E3, M6, V2). Computed tomography (CT) of the brain revealed diffuse subarachnoid hemorrhage (SAH) with blood notably present in the quadrigeminal and supracerebellar cisterns (Figure 1). Cerebral angiogram demonstrated a distal P3 posterior cerebral artery (PCA) aneurysm (Figure 2). The PCA aneurysm was successfully treated with endovascular coil occlusion.
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