What causes CPPD?

What causes CPPD?

This condition results from the abnormal formation of calcium pyrophosphate dihydrate (CPPD) crystals in the cartilage (cartilage is the "cushion" between the bones) or the joint fluid (synovial fluid). This can lead to a sudden attack of arthritis similar to gout.

The cause of abnormal deposits of CPPD crystals in cartilage is often unknown. CPPD crystals may be seen associated with some underlying disorders such as injury to the joint, hyperparathyroidism, hypomagnesemia, hypophosphatasia, hypothyroidism and hemochromatosis. The abnormal formation of CPPD crystals may also be a hereditary trait.