Paget disease is a well-documented skeletal disease and it has an increased rate of tissue breakdown due to the excessive turnover of osteoblasts and osteclasts. Stress fracture is one of the most common complications in the late phase of Paget disease, but the clinical presentation of incomplete pathologic fracture is rare and this is an important clue to plan the treatment. We experienced a case of Paget’s disease in a 74 year old woman with a periprosthetic fracture from the undetected, imcomplete stress fracture in the proximal femur.
