Fig. 2From: Medial abrasion syndrome: a neglected cause of persistent pain after knee arthroplastyArthroscopic findings when performing AMR in a patient with PPOP. a, b Before AMR, the patello-femoral joint was tight, and the fibrotic medial plica was found in the medial gutter (DM, distal medial plica; PM, proximal medial plica). c After AMR, the tension of the patello-femoral joint was released, and the medial retinaculum (*) was clearly visibleBack to article page