Origin of Pretruncal Nonaneurysmal Subarachnoid Hemorrhage: Ruptured Vein, Perforating Artery, or Intramural Hematoma? Wouter I. Schievink, MD,, Eelco.

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Origin of Pretruncal Nonaneurysmal Subarachnoid Hemorrhage: Ruptured Vein, Perforating Artery, or Intramural Hematoma? Wouter I. Schievink, MD,, Eelco F.M. Wujicks, MD Mayo Clinic Proceedings Volume 75, Issue 11, Pages 1169-1173 (November 2000) DOI: 10.4065/75.11.1169 Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions

Figure 1 Computed tomograms of patients with pretruncal nonaneurysmal subarachnoid hemorrhage showing localized hemorrhage in the prepontine (left) and interpeduncular (right) cisterns. Mayo Clinic Proceedings 2000 75, 1169-1173DOI: (10.4065/75.11.1169) Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions

Figure 2 Intraoperative photograph (left) and corresponding line drawing (right) of the prepontine and interpeduncular cisterns in a patient who underwent an orbitozygomatic craniotomy. Note the proximity of the possible sources of pretruncal nonaneurysmal subarachnoid hemorrhage. Mayo Clinic Proceedings 2000 75, 1169-1173DOI: (10.4065/75.11.1169) Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions

Figure 3 Magnetic resonance images (left and right) of patients with pretruncal nonaneurysmal subarachnoid hemorrhage. Note the proximity of the hematomato the basilar artery lumen. Mayo Clinic Proceedings 2000 75, 1169-1173DOI: (10.4065/75.11.1169) Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions

Figure 4 Frontal vertebral angiogram of a patient with a pretruncal nonaneurysmal subarachnoid hemorrhage. Note the smooth mild stenosis of the basilar artery as it traverses the prepontine cistern (arrowheads). Mayo Clinic Proceedings 2000 75, 1169-1173DOI: (10.4065/75.11.1169) Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions

Figure 5 A primary intramural hematoma of the basilar artery. Mayo Clinic Proceedings 2000 75, 1169-1173DOI: (10.4065/75.11.1169) Copyright © 2000 Mayo Foundation for Medical Education and Research Terms and Conditions