Fig. 1

The bone scintigraphy and MR images of a patient with multiple joint osteonecrosis. A Evidence of increased osteoblastic reaction in the left femoral head, consistent with the reparative phase of AVN, increased osteoblastic reaction in the left proximal humeral epiphysis; indicating an early phase of AVN, and increased osteoblastic reactions in the right distal femoral epiphysio-metaphyseal region and the left knee joint, suggesting an inflammatory process versus early reparative phase of AVN. B MRI images show AVNs in the left knee (a), right knee (b), and left shoulder (c). Bilateral Bone Infarcts and Arco Stage 2 AVNs of Femoral Condyles and left Humoral Head according to ARCO Classifications