Fig. 2.

Case 2. A 23 years-old female with right hemiparesis. Head non contrast computed tomography (NCCT) (A) and CT angiography (CTA) (B) after intravenous (i.v.) administration of iodinated contrast medium show a partially-thrombosed giant aneurysm of the left posterior cerebral artery (P3 tract) with a small patent lumen (B) confirmed at catheter digital subtraction angiography (DSA) (C). Magnetic resonance (MR) reveals a significant amount of PE in the left cerebral peduncle and thalamo-capsular region (D) and demonstrates the heterogeneous signal intensity of the intraluminal clot suggesting repetitive intra-aneurysmal hemorrhage (E). Subtle contrast-enhancement is noted along the aneurysmal walls after i.v. administration of gadolinium (F). A 1-month follow-up MR study after endovascular treatment reveals the complete resolution of peri-aneurysmal edema and visible shrinkage of the thrombus (G, H). No signs of recanalization of the treated aneurysm are observed on post-treatment DSA (I).