Case No. 21

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Case No. 21


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Chief Complaint:

Knee Pain

Published: May 10, 2017
Case No. 21
Author: jason.lopez

A patient presents to his primary care doctors office with knee pain for 4 days. He has been having difficulty bending his knee, putting weight on his leg, and walking. He denies trauma. On exam his knee is swollen and erythematous. You are able to elicit pain with passive range of motion. You suspect that the patient may be having a gout flare and perform an arthrocentesis.


Which of the statements regarding the diagnosis of gout is correct?

Crystals will be positively birefringent
Crystals will be negatively birefringent
Crystals are rhomboid shaped
Crystals are composed of calcium pyrophosphate