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AJNR - American Journal of Neuroradiology

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Postangiographic 3D CT Findings of a Thrombosed Dissecting Aneurysm of the Posterior Inferior Cerebellar Artery

Takatoshi Sorimachi^a, Yukihiko Fujii^b, Takeo Nashimoto^a, Atsuko Harada^a, Yasushi Ito^b and Shigekazu Takeuchi^c

^a Department of Neurosurgery, Nishiogi-chuo Hospital, Tokyo, Japan
^b the Department of Neurosurgery, Brain Research Institute, Niigata University, Niigata, Japan
^c the Department of Neurosurgery, Nagaoka Chuo General Hospital, Niigata, Japan

View larger version (80K): [in a new window]   FIG 1. A right vertebral angiogram (anteroposterior [AP] view) obtained the day of the onset shows segmental stenosis (arrow) in the anterior meddullary segment of the right posterior inferior cerebellar artery (PICA).

View larger version (80K): [in a new window]   FIG 2. 3D CT scan (AP view) obtained immediately after angiography. A fusiform aneurysm (arrow) is revealed in the anterior medullary segment of the right PICA (arrowheads).

View larger version (80K): [in a new window]   FIG 3. A right vertebral angiogram (AP view) obtained 16 days after onset. A fusiform aneurysm (arrow) is depicted in the anterior medullary segment of the right PICA.