Parent vessel occlusion for P2 dissecting aneurysms of the posterior cerebral artery

BackgroundDissecting aneurysms of the PCA are difficult to treat with preservation of the parent arteries. We report the clinical and angiographic outcome for 8 patients with dissecting aneurysms located at the P2 segment of the PCA.MethodsIn the past 5 years, 8 patients, 2 female and 6 male, presented to our institution with P2 dissecting aneurysms of the PCA and were treated endovascularly. The age of our patients ranged from 4 to 58 years, with a mean age of 34.4. Of the 8 patients, 5 had subarachnoid and/or intracerebral hemorrhage upon presentation. Two patients with P2 dissecting aneurysms presented with mild hemiparesis and hypoesthesia; 1 patient with a large dissecting aneurysm complained of headaches.ResultsEight patients with P2 aneurysms of the PCA underwent PVO. Parent vessel occlusions were performed with detachable coils. No patient developed neurologic deficits.ConclusionP2 dissecting aneurysms can be treated with PVO in the cases in which selective embolization of the aneurismal sac with detachable platinum coils or surgical clipping cannot be achieved.