Fusiform aneurysm of the posterior cerebral artery: report of two cases.

Two cases with fusiform aneurysm in the posterior cerebral artery are presented: The first one is a large fusiform aneurysm of the P(2) segment of posterior cerebral artery (PCA) in a 58 years old patient and the second a fusiform aneurysm of the P(3) segment of PCA in a 43 years old patient. The aneurysms were successfully treated the first by proximal ligation and the second by trapping of the aneurysm. The patients had no additional neurological deficits postoperatively and they are in an good condition, in four years and one year follow up respectively. The operative approaches and the radiological investigation in relation to the micro-anatomy of the posterior cerebral artery, as well as the outcome in these cases are discussed.