case_images: PMC4053235_01
case_images: Left internal carotid injection. The arrowhead shows an azygous A2 from which both the pericallosal arteries arise.
case_images: CRIRA2014-541081.001.jpg
case_images: PMC4053235_01_CRIRA2014-541081.001.jpg
case_images: fig1
case_images: Computed tomographic angiogram showing the azygous A2.
case_images: CRIRA2014-541081.002.jpg
case_images: PMC4053235_01_CRIRA2014-541081.002.jpg
case_images: fig2
case_images: Left vertebral artery injection. There is no filling of the PICA and the corresponding territory.
case_images: CRIRA2014-541081.003.jpg
case_images: PMC4053235_01_CRIRA2014-541081.003.jpg
case_images: fig3
case_images: The right and left vertebral arteries were unremarkable for aneurysm or stenosis, but the left vertebral artery showed agenesis of the left PICA with no opacification of the corresponding cerebellar territory (Figure 3).
case_images: Right vertebral injection. The right PICA gives branches to supply the PICA territory in the left hemisphere.
case_images: CRIRA2014-541081.004.jpg
case_images: PMC4053235_01_CRIRA2014-541081.004.jpg
case_images: fig4
case_images: The PICA branching from the right vertebral artery was enlarged and crossed the midline to supply both cerebellar hemispheres (Figure 4).