Drs. Prolla and Diehl's INTERESTING CASE OF THE MONTH May 2005
Left knee synovial fluid aspiration, 74-year old male: uric acid crystals, gout arthritis.

gout arthritis. 100x M-G-G staining, needle crystals

gout arthritis. 500x M-G-G staining, needle crystals

gout arthritis. 500x M-G-G staining, needle crystals

gout arthritis. 100x and 500x Papanicolaou staining, needle crystals

gout arthritis. 100x under polarized light: uric acid needle crystals

The smears of the synovial fluid show many needle shape crystals: both in M-G-G and Papanicolaou stained ones. The use of polarized light shows them quite nicely. The patient has a serum uric acid value of 9.3mg/dL, confirming the diagnosis of gout.


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