Figure 16b. (a) Radiograph demonstrates a mixed lytic and sclerotic lesion with a permeative, aggressive, nonspecific pattern. A subtle intertrochanteric and subtrochanteric fracture is also seen (arrow). (b) CT scan reveals intraosseous chondroid matrix (arrow) and an unmineralized soft-tissue mass (arrowheads). (c, d) Coronal T1-weighted (c) and axial T2-weighted (d) MR images more clearly show the size and extent of the large unmineralized soft-tissue mass (arrowheads), which represents the dedifferentiated component of a bimorphic cartilage tumor.