title: Totally thrombosed giant P2 aneurysm: a case report and review of literature.
abstract: The diagnosis and treatment of intracranial saccular giant aneurysms is still difficult despite developments in neuroradiology, neuroanesthesiology and micro-neurosurgery. These aneurysms are usually located on major intracranial arteries and are rarely on distal branches of these arteries. An extra-axial 4 x 5 cm mass lesion in the left mediobasal temporal region was detected on the CT and MRI examinations of a 37 year old male patient who was admitted to our institution with headache and slight right-sided hemiparesis lasting for 2 months. The lesion was avascular on angiography. Surgery proved that the lesion was a totally thrombosed giant aneurysm of the P2 segment of posterior cerebral artery (PCA). The P2 segment was clipped proximal to the aneurysm with pterional-transsylvian approach and the aneurysm was totally excised. Giant aneurysms of the P2 segment are rare and 15 cases have been reported in the literature. This report presents a rarely seen totally thrombosed giant P2 aneurysms and discusses the difficulties in diagnosis and treatment.
authors.affiliation: Department of Neurosurgery and Radiology, Marmara University School of Medicine, Istanbul, Turkey. ugurture@turk.net
authors.forename: Uğur
authors.initials: U
authors.lastname: Türe
authors.forename: Ilhan
authors.initials: I
authors.lastname: Elmaci
authors.forename: Gazanfer
authors.initials: G
authors.lastname: Ekinci
authors.forename: M Necmettin
authors.initials: MN
authors.lastname: Pamir
mesh_terms: D000328:Adult; D002533:Cerebral Angiography; D006801:Humans; D002532:Intracranial Aneurysm / Q000150:complications* / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D008297:Male; D013927:Thrombosis / Q000150:complications* / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed