Abstract Background Osteitis fibrosa cystica is a rare. benign and osteolytic lesion attributed to hyperparathyroidism. The high level of parathyroid hormone cause rapid bone loss. Case presentation The patient is a 50-year-old male complaining of severe and persistent pain in the right knee joint. https://www.getpureroutine.com/hot-offer-rosy-teacups-dogwood-discount-best-super/