What Is Pseudogout? From the College | June 30, 2023 The term pseudogout has been a source of confusion among rheumatologists, especially as our understanding of calcium pyrophosphate crystal deposition (CPPD) disease has become more nuanced. The crystal deposits in pseudogout differ from those in gout. Review our article for details: "Pseudo-What? Exploring the Classification Criteria Development Process for CPPD." What two criteria have been identified as sufficient criteria for classification of CPPD disease? A. CPPD crystals in synovial fluid and calcium pyrophosphate deposition on ultrasound B. Crowned dens syndrome and CPPD crystals in synovial fluid C. Synovial fluid analysis and calcium pyrophosphate deposition on ultrasound D. Crowned dens syndrome and calcium pyrophosphate deposition on ultrasound None Time's up