Intracanalicular Aneurysm of the Anterior Inferior Cerebellar Artery Revealed by Multi-Detector CT Angiography
Mahesh V. Jayaramana,
William W. Mayo-Smitha and
Curtis E. Dobersteinb
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
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FIG 1. Frontal projection digital subtraction angiogram, left vertebral artery injection, shows a small aneurysm (arrow) arising from a branch of the left anterior inferior cerebellar artery.
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FIG 2. Axial CT angiogram again shows the small left-sided aneurysm (arrow). The intracanalicular location is clearly shown.
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FIG 3. Frontal projection digital subtraction angiogram, left vertebral artery injection, shows no residual filling of the aneurysm after successful surgical trapping.
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FIG 4. Maximal intensity projection images.
A and B, Consecutive maximal intensity projection images from multi-detector CT angiography, obtained in an oblique coronal plane, show the anterior inferior cerebellar artery branch entering the internal meatus and the aneurysm (arrows).
C, Note that the plane necessary to produce these images is an oblique coronal plane (as shown) and that the slab thickness is thinner than the internal auditory canal.
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