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Fig. 6. —Anterior epidural venous plexus in 67-year-old man with left upper lobectomy because of lung cancer. Transverse contrast-enhanced CT scan shows anterior epidural venous plexus (arrow) located at anterior aspect of spinal canal, through which right and left vertebral veins anastomose. Note no evidence of opacification of venous plexus located at posterior aspect of spinal canal.