Fig. 3

Plastic lengthening amputation of the proximal femur in a 7-year-old boy. a The contaminated operation was performed in the femur of a patient with osteosarcoma who was misdiagnosed with traumatic fracture and intramedullary fixation with two Steinmann pins. b Coronal and sagittal MRI views show that the contaminated pins reached just below the greater trochanter (5.5 cm stump left). c X-ray shows that the tibia was fixed to the remnant femur with an addition of 18 cm to the stump after the operation. d X-ray was performed 2 years after the operation