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A 9-year-old girl with osteosarcoma of the distal radius. A step-cut was performed proximally for the stability of surgical reconstruction by using a PSI. Two margins were measured (medial and lateral part of the step-cut). Note the difficulty to visualize the cortical bone in the step-cut with MRI. (a) T1-weighted MRI; (b) macroscopic cut; (c) T2-weighted MRI.
