PT - JOURNAL ARTICLE AU - Ribeiro, M. AU - Howard, P. AU - Willinsky, R. AU - ter Brugge, K. AU - Agid, R. AU - Thines, L. AU - da Costa, L. TI - Intrasellar Rupture of a Paraclinoid Aneurysm with Subarachnoid Hemorrhage: Usefulness of MR Imaging in Diagnosis AID - 10.3174/ajnr.A1022 DP - 2008 May 01 TA - American Journal of Neuroradiology PG - 980--982 VI - 29 IP - 5 4099 - http://www.ajnr.org/content/29/5/980.short 4100 - http://www.ajnr.org/content/29/5/980.full SO - Am. J. Neuroradiol.2008 May 01; 29 AB - SUMMARY: Characterization of paraclinoid aneurysms may be difficult because of the complexity of anatomic structures involved, and differentiation between intradural and extradural lesions is crucial. We report a case of a patient with a unique presentation of a paraclinoid aneurysm with intrasellar hemorrhage in which the presence of intrasellar blood and the relationship of the paraclinoid aneurysmal neck and sac to the dural rings were elegantly demonstrated on MR imaging and were critical in choosing the target lesion for treatment.