Recurrent transient osteoporosis of the hip

A 49-year-old woman had suffered from a left hip pain. Radiographs showed a focal loss of radiodensity in the left femoral head and neck, and magnetic resonance imaging revealed a bone marrow edema in the femoral head. She was diagnosed as transient osteoporosis of the hip and was treated conservatively. Three years later, right hip pain occurred. Based on the imaging appearances, she was diagnosed as transient osteoporosis of the hip in the right and was treated conservatively. Five years after the onset of right hip pain, she suffered from a recurrent right hip pain. Imaging findings were similar to those obtained 5 years before. Five months after the onset of pain, both hip pain and imaging abnormalities disappeared by the same treatments as the previous episodes. This case was considered to have recurrent transient osteoporosis of the hip.