Figure 3.
A 37-year-old male with a pathological diagnosis of periosteal chondrosarcoma (Case 4). (a) Radiograph of the left leg showing a lobulated calcified mass on the anterior aspect of the diaphysis of the fibula. The cortex is eroded. (b) T1-weighted MRI showing a lobulated mass (5.5 × 2.5 × 3.5 cm), with low signal intensity, arising from the periosteum. (c) T2-weighted fat suppressed MRI showing a predominantly high signal intensity mass. Neither medullary invasion nor adjacent soft tissue oedema are present.