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AJNR - American Journal of Neuroradiology

Publication Preview: Published February 22, 2008

American Journal of Neuroradiology 2008;29:980.

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American Journal of Neuroradiology
DOI 10.3174/ajnr.A1022

INTERVENTIONAL

Intrasellar Rupture of a Paraclinoid Aneurysm With Subarachnoid Hemorrhage: Usefulness of MR Imaging in Diagnosis

M. Ribeiro, P. Howard, R. Willinsky, K. ter Brugge, R. Agid, L. Thines and L. da Costa

From the Department of Neuroradiology (M.R.), Hospital São Marcos, Braga, Portugal; and Department of Medical Imaging (P.H., R.W., K.t.B., R.A., L.d.C.) and Division of Neurosurgery (L.T.), Department of Surgery, Toronto Western Hospital, University of Toronto, Toronto, Ontario, Canada.

Please address correspondence to Manuel Ribeiro, MD, Hospital São Marcos, Largo Engenheiro Carlos Amarante, Apartado 2242, Braga, Portugal, 4701–965; e-mail: manuelqr{at}portugalmail.pt

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.