A Crystal with Long, Thin, Needlelike, Pointed Ends Is Identified

A crystal with long, thin, needlelike, pointed ends is identified in synovial fluid.The crystals are located within the cells and outside the cells.A quartz compensator is used, and it is determined that the crystals are negatively birefringent, and are a yellow color when parallel to the axis of the compensator.The crystal is blue when turned perpendicular to the axis of the compensator.What is the type of crystal?

A) Monosodium urate
B) Calcium pyrophosphate
C) Cholesterol crystals
D) Pseudogout

Correct Answer:

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