Fig. 15From: Lesions involving the outer surface of the bone in children: a pictorial reviewPeriosteal osteosarcoma in the right proximal femur. Axial a and coronal b T2 images reveal high signal soft-tissue mass involving predominantly the vastus medialis and intermedius with cortical disruption and intraosseous extension at the anteromedial aspect of the right femur (arrow)Back to article page