Calcium Pyrophosphate Deposition (CPPD) - is one of the most common inflammatory arthritis in the world, and yet, it doesn't receive the recognition it deserves. Our discussion today will feature everything you've ever wanted to know about this disease. We'll review the basics, diagnosis through arthrocentesis and various imaging studies, creating classification criteria for CPPD, treating both the acute and chronic manifestations of CPPD as well as all the questions that remained unanswered.