A synovial fluid has a high white cell count and large intracellular needlelike crystals that are yellow when the crystals are parallel to the y-axis of a red compensator. What is the likely diagnosis?

a. Pseudo-gout
b. Gout
c. Lupus erythematosus
d. Bacterial infection


ANS: B
These are monosodium urate crystals and are seen in gout.

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