Questions for Discussion:

  1. What is the differential diagnosis of acute monarthritis?  Answer
  2. What tests should be done?  Answer
  3. What diagnostic information can be obtained from synovial fluid?  Answer

Aspiration of the left ankle yielded 10cc cloudy yellow fluid. Negatively birefringent out intracellular crystals are seen by polarized light microscopy.

  1. What do you do now?  Answer
  2. How would you have managed this case if crystals had not been found?  Answer