title: Duplicate origin of the posterior communicating artery diagnosed by magnetic resonance angiography.
abstract: Extremely rarely, a posterior communicating artery (PCoA) of "duplicate origin" occurs when two branches of the PCoA arise separately from the supraclinoid segment of the internal carotid artery (ICA) and quickly fuse to form an arterial ring. Three such cases previously reported were described as "fenestration." We report the case of this rare variation diagnosed by magnetic resonance angiography and discuss the differentiation of PCoA of duplicate origin from PCoA fenestration, supraclinoid ICA fenestration, and hyperplastic anterior choroidal artery.
authors: Department of Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan, auchino@saitama-med.ac.jp.
authors: Akira
authors: A
authors: Uchino
authors: Kouhei
authors: K
authors: Kamiya
authors: Chihiro
authors: C
authors: Suzuki
mesh_terms: D000328:Adult; D063405:Anatomic Variation; D002343:Carotid Artery, Internal / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D020769:Posterior Cerebral Artery / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D011859:Radiography