Lipoma Arborescens of the Knee: Another Cause of Filling Defects on a Knee Arthrogram

Abstract

Lipoma arborescens is a rare intra-articular tumor usually found in the knee. In the case reported arthrography disclosed multiple filling defects consistent with the tumor's gross pathology. The types of filling defects seen on the arthrogram in this and other synovial abnormalities are similar and are not considered to be specific.