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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 24:1338-1340, August 2003
© 2003 American Society of Neuroradiology

Case Report
HEAD AND NECK

Intracanalicular Aneurysm of the Anterior Inferior Cerebellar Artery Revealed by Multi-Detector CT Angiography

Mahesh V. Jayaraman^a, William W. Mayo-Smith^a and Curtis E. Doberstein^b

^a Department of Diagnostic Imaging, Brown Medical School/Rhode Island Hospital, 3rd Floor, Main, 593 Eddy Street, Providence, RI 02903
^b Department of Neurosurgery, Brown Medical School/Rhode Island Hospital, 3rd Floor, Main, 593 Eddy Street, Providence, RI 02903

Address reprint requests to Mahesh Jayaraman, MD, Brown Medical School/Rhode Island Hospital, 3rd Floor, Main, 593 Eddy Street, Providence, RI 02903

Summary: A 62-year-old woman had sudden-onset headache and posterior neck pain, and a subarachnoid hemorrhage was revealed by unenhanced CT. Both multi-detector CT angiography and digital subtraction angiography were performed and revealed a small intracanalicular aneurysm of the left anterior inferior cerebellar artery. The patient underwent successful retrosigmoid craniectomy and trapping of the aneurysm. This case shows the ability of multi-detector CT angiography to indicate bony landmarks that can alter the surgical approach.