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  • Title: Saccular bilobed aneurysm of an azygos anterior cerebral artery.
    Author: Jagetia A, Kumar PN, Sinha S, Sharma A.
    Journal: J Clin Neurosci; 2007 Aug; 14(8):777-9. PubMed ID: 17577525.
    Abstract:
    An azygos anterior cerebral artery is an anatomical variant in which the anterior communicating artery is absent and both the A1 segments unite to form a single A2 segment of the artery. This anatomical variant may be associated with holoprosencephaly and may predispose to aneurysm formation, however the association of such an anomaly with an aneurysm is rare. When associated with an aneurysm, it poses management difficulties due to the single distal anterior cerebral artery. Most of the reported aneurysms with such an anomaly are saccular and located in the distal part of the artery. We report a patient with a wide neck saccular multilobed aneurysm who presented after a grade 3 subarachnoid haemorrhage. A right pterional craniotomy and clipping of the aneurysm was performed following cerebral angiography. The mechanism of formation and difficulties in management of such an aneurysm is discussed.
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