FIG 5. Another case of "hypoplastic VA." The right VA terminates in the posterior inferior cerebellar artery (PICA) on both MRA (A, arrows) and BPAS-MR imaging (B, arrows). Note the absence of the distal right VA on BPAS-MR imaging (B). On T2-weighted axial image (C), it is actually difficult to distinguish from the right PICA from the hypoplastic small VA.