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65312 Pathology

A 7-year-old boy sustained an open compound fracture of the right tibia and fibula in a fall from a barn loft to the floor below. On physical examination, the lower tibia and fibula can be seen protruding from the lower leg. The fracture is set by external manipulation, and the skin wound is sutured, but nothing more is done. One year later, he continues to have pain in the right leg, and a draining sinus tract has developed in the lateral lower right leg. A radiograph of the lower right leg is now most likely to show which of the following?

ACortical nidus with surrounding sclerosis
BInvolucrum and sequestrum
COsteolysis with osteosclerosis
DSoft-tissue hemorrhage and swelling
Pathology
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