A woman with pain and swelling in the left knee


A 75-year-old woman presents with acute pain and swelling in the left knee. On examination the left knee is hot and tender with moderate synovial fluid collection. Radiograph of the right knee shows calcification of the meniscus.

Synovial fluid was sterile on culture and rhomboid shaped crystals were identified on microscopy of the fluid.
Which of the following statements about this condition is NOT true?
A. Narrowing of the joint space is often present B. The symphysis pubis is one of many other joints that can be affected by this disorder C. Serum calcium levels may be elevated in some patients
D. Negatively birefringent crystals may be identified on synovial fluid analysis E. There may be large subchondral cysts


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