Fig. 3

27-year-old female, parosteal osteosarcoma left distal femur (a) Plain film images of both knees demonstrating bony mass extension from the posterior part of the distal femur. b Axial MRI reveals infiltrative intramedullary lesion and soft tissue component showing heterogenous enhancement with intralesional calcification, (c) sagittal CT scan reveals bony mass involving distal femoral metaphysis from the posterior aspect