Which specific anatomical features of posterior cerebral artery (PCA) stroke may be identified on angiography?

Updated: Jul 30, 2018
  • Author: Erek K Helseth, MD; Chief Editor: Helmi L Lutsep, MD  more...
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Answer

Specific anatomical features of PCA aneurysms were identified by angiographic study of 81 patients with a diagnosis of 93 PCA aneurysms. In this anatomical study, 53 patients underwent computed tomography angiography, 49 underwent digital subtraction angiography, and 6 underwent magnetic resonance angiography. There were 29 ruptured and 64 unruptured PCA aneurysms. The distribution of the aneurysms along the PCA segments was P1 (N = 39; 9 ruptured), P1/P2 junction (N = 25; 9 ruptured), P2 (N = 21; 5 ruptured), and P3 (N = 8; 6 ruptured). The median aneurysm size was 7 mm for the ruptured aneurysms and 4 mm for the unruptured aneurysms. Saccular aneurysms (N = 69, 74%) had a typical projection for each location: P1 segment, upward (67%); P1/P2 junction, anterior/upward (80%); P2 segment, lateral (67%); and P3 segment, posterior (50%). Multiple aneurysms were seen in 43 patients. PCA aneurysms related to arteriovenous malformations were observed in 10 patients. [11]


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