In a 42-year-old man with intermittent calf claudication, cystic adven
titial disease of the popliteal artery was demonstrated by 3D CT. Cyst
ic mass was seen to be compressing the arterial lumen. The diagnosis o
f cystic adventitial was confirmed by surgery. Compared with color dop
pler sonography, MR Imaging, 3D CT profides additional useful anatomic
information concerning disease of the popliteal artery, usually gaine
d only with sonography or arteriography.