De Novo Aneurysm on the Posterior Cerebral Artery: A Case Report and Literature Review

Ekawut Chankaew MD*, Bunpot Sitthinamsuwan MD, MSc*, Prajak Srirabheebhat MD*, Thaweesak Aurboonyawat MD, MSc*, Sarun Nunta-aree MD, PhD*

Affiliation : * Division of Neurosurgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand

De novo aneurysm formation is a rare entity of cerebral aneurysms. The authors describe a 19-year-old man presenting with spontaneous intracerebral hemorrhage of unknown etiology. The initial cerebral angiography revealed no identifiable vascular lesion. A few weeks following a surgical evacuation of the hematoma, a tiny saccular aneurysm was incidentally found on the distal posterior cerebral artery (PCA) remote from the site of the primary ictus. Several rationales indicated that it was compatible with a cerebral aneurysm of infective etiology. The aneurysm was successfully treated by antibiotic therapy alone. To the authors’ knowledge, de novo aneurysm on the PCA has rarely been reported.

Keywords : Cerebral de novo aneurysm, Posterior cerebral artery, Cerebral hemorrhage

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