Arthroscopic synovectomy for synovial hyperplasia in chronic knee gouty arthritis: A case report

Figure 1 Plain radiography of the left knee revealed no abnormalities.

Figure 2 Preoperative magnetic resonance imaging revealed a large knee effusion in combination with synovitis. A: Sagittal T2-weighted view; B: Axial T2-weighted view.

Figure 3 Diagnostic arthroscopy findings of chronic knee gouty arthritis. A: Floating tophi were observed after the insertion of the viewing portal; B: Deposition of tophi on the cartilage surface of the femoral condyle; C: Deposition of tophi on the cartilage surface of the tibial plateau; D: Deposition of tophi on the anterior cruciate ligament surface.

Figure 4 Arthroscopic synovectomy for synovial hyperplasia in chronic knee gouty arthritis. A: Excessive synovial tissue was observed; B: Partial synovectomy was performed through the anteromedial portal; C: Partial synovectomy was also performed through the anterolateral portal; D: Radiofrequency was applied to the synovial surface after the thorough partial synovectomy.