Periosteal chondrosarcoma.

OBJECTIVE: The purpose of this article is to identify the typical imaging features of periosteal chondrosarcoma on radiography, CT, and MRI.

CONCLUSION: Periosteal chondrosarcoma is a rare low-grade malignant cartilaginous tumor arising from the external surface of bone. Imaging features are often specific. Recognizing periosteal chondrosarcoma and differentiating it from other surface tumors is of capital importance because the prognosis is excellent after adequate local surgery alone.