Extraskeletal myxoid chondrosarcomas. Lateral ankle radiograph (A) and axial fat-suppressed T2-weighted image (B) obtained in 42-year-old man with extraskeletal myxoid chondrosarcoma of Kager's fat pad show large mass in fat pad. On radiograph, soft-tissue mass (asterisks, A) is shown to be completely obliterating fat pad and eroding calcaneus (arrow, A). T2-weighted image (B) reveals large mass with predominantly high signal intensity and macrolobulated margins.

http://www.ajronline.org/cgi/content/full/182/1/147/FIG18