Radiology Cases Chondroma Enchondroma

Description: This is a fairly common bone tumour. It present in the older patient unless there is a pathological fracture. The lesion is usually within a diaphysis. 50% occur in the hand, 10% in the feet, 20% in the long bones. It is often multiple. It has a well-defined endosteal margin, but expands the bone with cortical scalloping. There may be flecks of contained calcification. The lesion is of low vascularity. There is no periosteal reaction unless associated with a fracture. The lesion rarely extends to the ends of the bone. Bone scan shows poor uptake.