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Double Origin of the Posterior Inferior Cerebellar Artery

Walter S. Lesleya and Henry J. Dalsaniaa

a From the Departments of Radiology and Surgery, Section of Surgical Neuroradiology, Saint Louis University School of Medicine, St. Louis, MO



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  		FIG 1. Double origin of the right PICA. Angiograms of the right VA show two separate and distinct PICA vessels (black arrows) arising from the V4 segment. They unite at the midportion of the anterior medullary segment of the PICA (white arrows). The vertebrobasilar junction (asterisk) is opacified at the convergence of the hypoplastic right and the dominant left V5 segments.

A, Lateral projection.

B, Frontal projection

C, For comparison, the right V5 segment (arrow) is seen filling retrograde on the frontal projection angiogram of the left VA. The left PICA, basilar, and bilateral anterior inferior cerebellar arteries are normal.





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X