Figure 11b. Sagittal T2-weighted MR image of the distal femur (a) and coronal gradient-echo MR image of the right shoulder (b) obtained in two different patients with dedifferentiated chondrosarcoma demonstrate high-signal-intensity medullary calcific lobules (arrows) and punctate low-signal-intensity foci representing medullary calcifications (arrowheads). These MR imaging features are typical of chondroid matrix.