J Korean Neurosurg Soc.  2012 Sep;52(3):240-242.

Transposition of Anterior Choroidal Artery and Posterior Communicating Artery Origin

  • 1Department of Neurosurgery, Ilsan Paik Hospital, Inje University, Goyang, Korea. cychoi@paik.ac.kr


The anterior choroidal artery has several kinds of variations. Among them, the transposition of anterior choroidal artery and posterior communicating artery origins has been extremely rare. We report a case with cerebral aneurysm arising from posterior communicating artery which origin was distal to the anterior choroidal artery and review the relevant literature.


Cerebral aneurysm; Anterior choroidal artery; Posterior communicating artery; Transposition

MeSH Terms

Intracranial Aneurysm


  • Fig. 1 CT reveals subarachnoid hemorrhage (A) and two small aneurysms arising from the right (B) and left (C) distal supraclinoid ICAs on the lateral CT angiograms. The left cerebral aneurysm with more elongated shape seems to be ruptured. CT : computed tomography.

  • Fig. 2 Left AP (A) and lateral (B) ICA angiograms show a small aneurysm arising from fetal type PcomA, posterior cerebral artery (arrow head), and a transposition of the origins of PcomA and AchoA (arrow). The AchoA is arising from ICA proximal to the origin of PcomA. ICA : internal carotid artery, PcomA : posterior communicating artery, AchoA : anterior choroidal artery.

  • Fig. 3 Intraoperative photograph shows a cerebral aneurysm arising from left fetal type PcomA which origin is distal to AchoA. Aneurysm sac is well clipped and all perforating branches arising from PcomA are also preserved. ICA : internal carotid artery, PcomA : posterior communicating artery, AchoA : anterior choroidal artery.


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