Figure 12a. MR imaging appearance. (a) Coronal T2-weighted fat-suppressed image (4,100/102) of a 21-year-old woman reveals a large lesion in the distal right femur with an associated soft-tissue mass. Plain radiograph (not shown) was reported to have shown a lytic lesion. (b) Sagittal T2-weighted image (4,100/102) reveals the posterior extent of the soft-tissue mass, which provided an ample site for biopsy.