Hydroxyapatite crystal deposition causing rapidly destructive arthropathy of the hip joint.

Destructive arthropathy of the hip joint can be attributed to various etiologies like rheumatoid arthritis, aseptic necrosis of the femur head, Charcot's joint, subacute septic arthritis, and tubercular arthritis. A disease that results in much rapid destruction of the hip joint and is not associated with clinical syndrome of above mentioned disease has been reported way back in 1970. However, no evidence-based study has been published to support hydroxyapatite (HA) crystals as a probable cause of rapidly destructive arthropathy of the hip joint. We report a case with microscopic and biochemical confirmation of HA crystal deposition causing destructive arthropathy of the hip joint.