A novel classification for posterior communicating artery aneurysms in the presence of fetal posterior cerebral artery: A registry-based study.

ABSTRACT: Background and objectivesFetal posterior cerebral artery (fPCA) is a common anatomical variant where the P1 segment is hypoplastic or absent, and the posterior communicating artery supplies the posterior cerebral artery (PCA) territory. Aneurysms in this setting often form at the internal carotid artery (ICA)-posterior communicating artery junction and are poorly defined. This study introduces a novel classification to address the fPCA variant, treatment challenges, and outcomes.MethodsThis registry-based study included fPCA aneurysms treated endovascularly at the Medical University of South Carolina (2013-2024). Aneurysms are classified into type-1 (shared neck with ICA and fPCA), type-2 (neck arises from ICA, and fPCA originates from the aneurysm), and type-3 (neck originates entirely fr

SUBMITTER: Loulida H 

PROVIDER: S-EPMC12286994 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature