A Rare Case of Acute Calcium Pyrophosphate Deposition Disease Following Zoledronic Acid Infusion.

Calcium pyrophosphate deposition (CPPD) disease of the joints is a form of arthritis that can present in a severely debilitating form of pseudogout. Although mostly idiopathic, pseudogout has been reported following bisphosphonate therapy in only nine cases to date with a pathophysiology that remains unclear. We present the case of a 59-year-old postmenopausal woman who developed the rare onset of acute polyarticular CPPD disease following zoledronic acid infusion for the treatment of osteoporosis.