Osteoradionecrosis of the mandible
Prior radiotherapy for floor of mouth SCC.
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The left hemimandible shows a mixed lytic destructive process involving the bone associated with a fracture in this region.
These appearances are consistent with osteonecrosis secondary to prior radiotherapy on this region in a patient with a previous SCC of the floor of mouth
Osteoradionecrosis of the mandible is seen in patients with previous radiotherapy for head and neck cancers. The changes maybe complicated by infection or a pathological fracture.
Bisphosphonate therapy is also associated with mandibular osteonecrosis. Mandibular osteomyelitis can give a similar radiological appearance.