Intracortical osteosarcoma: Is MRI useful?

Intracortical osteosarcoma is the rarest variant of osteosarcoma, originating from the bone cortex. We describe the imaging features, with special emphasis on MRI, of an intracortical osteosarcoma occurring in the tibia of a young female. The value of fat-saturated sequences in the local staging of this tumor, especially their sensitivity to demonstrate subtile peritumoral medullary and soft tissue oedema - not appreciated with conventional imaging techniques - is discussed.