Concomitant atypical knee gout and seronegative rheumatoid arthritis: A case report

Figure 1 Minimally invasive paths and the minimally invasive needle-knife scope therapy. A: The surgical pathways; B and C: The surgical instruments.

Figure 2 Intra-articular changes in the knee joint. A-C: Proliferative synovium and pannus; D-G: Intra-articular monosodium urate deposition.

Figure 3 Crystallization diagram of monosodium urate under polarized light microscopy.

Figure 4 Knee joint debridement process. A: Surgical process; B: Urate crystals washed out of the body; C: Before clearance; D: During clearance; E: After clearance.