RT Journal Article SR Electronic T1 Intra-articular lipoma causing snapping in the patellofemoral joint JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 955 OP 958 VO 28 IS 6 A1 Yilmaz, Erhan A1 Karakurt, Lokman A1 Yildirim, Hanifi A1 Ozercan, Resat YR 2007 UL http://smj.org.sa/content/28/6/955.abstract AB Intra-articular lipoma is an exceedingly rare diagnosis. We identified a lipoma that was seated in the retropatellar area and caused snapping of the patella during flexion of the knee joint. The tumor was easily and totally excised under arthroscopic guidance after the thin pedicle was cut.