抄録
We reported four cases of transient osteoporosis of the hip and reviewed the literature. Four patients of transient osteoporosis of the hip are described whose clinical findings are pain in the hips, slight limitations of motion with pain, and negative laboratory findings with complete spontaneous recovery. Plane radiographs revealed diffuse osteoporosis of entire femoral heads and necks. Radionuclide bone-scanning revealed diffuse, homogeneous and increased uptake involving entire femoral heads and necks and extending to the intertrochanteric regions. MR imaging showed low signal intensity of bone marrow on T1-weighted images and high signal intensity relative to the intensity of normal bone marrow on T2-weighted images extending to the metaphyseal regions. The low bone mineral density (BMD) of the proximal femurs was observed by dual energy X-ray absorptiometry (DXA). Early differential diagnosis from avascular necrosis of the hip is necessary by using the above mentioned methods.
