Multiple hereditary exostoses as a rare nonatherosclerotic etiology of chronic lower extremity ischemia

Contrast-enhanced multidetector computed tomography scan of the knee. A, 3D volume rendered demonstrates a distal femoral and a proximal tibial enchondroma (arrows). The tibial enchondroma produces displacement of the popliteal vessels. The popliteal artery is occluded (arrowhead) with delineation of collateral circulation in the proximal leg. B, Sagittal maximum-intensity projection reconstruction shows a soft tissue abnormality around the osteochondroma representing inflammatory tissue (arrowheads). The popliteal occlusion is identified (arrow).