FIG 4. 68-year-old woman.

A and B, Contrast-enhanced fat-suppressed T1-weighted (630/20/2) axial images (superior to inferior) show the anterior condylar vein (large straight arrow), suboccipital cavernous sinus (curved arrow), vertebral venous plexus (arrowhead), vertebral artery venous plexus (small straight arrows), and anastomotic vein (wavy arrow).