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Figure 5 | Arthritis Research & Therapy

Figure 5

From: Animal model of acute gout reproduces the inflammatory and ultrasonographic joint changes of human gout

Figure 5

Standard light and compensated polarized light microscopic analysis of synovial fluid (SF) from the monosodium urate (MSU) and allopurinol groups. Observe the presence of intra- (arrows) and extra-cellular negatively birefringent needle-shaped crystals in the MSU-crystal group at day 1. MSU crystals phagocytized by polymorphonuclear cells were seen at days 1 and 3. Absence of MSU and allopurinol crystals was observed at day 7.

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