High Synovial Fluid White Blood Cell Counts in Pseudogout

Abstract
During a 12-month period, we have treated five patients with acute inflammatory arthritis and synovial fluid leukocyte counts of 65,000 to 100,000/cu mm with 93% to 100% polymorphonuclear cells, calcium pyrophosphate dihydrate crystals in the synovial fluid, and negative cultures. Four of these five were originally treated for septic joints. We would like to emphasize this relatively uncommon, but important, manifestation of pseudogout.