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. 2007 Jun;28(6):1185–1190. doi: 10.3174/ajnr.A0498

Fig 8.

Fig 8.

An aberrant course of the distal right VA (PSA type) in a 64-year-old woman.

A, DSA, right VA, anteroposterior view. This variant is similar to the VA duplication shown in Fig 7, with a double origin of the PICA from the PSA (white arrow) and from the distal VA (white arrowhead). The difference between the 2 variants lies in the absence of a segment of the right VA between the 2 PICA origins, resulting in a seemingly “aberrant” course of the VA.

B, DSA, right VA, lateral view. As with Fig 8A, this variant is also similar to the VA duplication shown in Fig 7, with a double origin of the PICA from the PSA (white arrow) and from the distal VA (white arrowhead).