A 15-year-old boy presents with a rapidly enlarging swelling of the lower jaw accompanied by intermittent pain. The swelling developed following a traumatic injury. Radiographic imaging shows new subperiosteal bone growth creating an onion-skin pattern. The patient also experiences lip numbness and has an elevated white blood cell count. Based on these clinical and radiographic findings, which of the following is the most likely provisional diagnosis?
Explanation
The presentation of a rapidly growing mandibular swelling after trauma, combined with subperiosteal new bone formation showing an onion-skin appearance on radiographs, lip paresthesia, and elevated white blood cell count, is consistent with a mandibular fracture healing with cancellous bone formation. Other options like chronic osteomyelitis, Burkitt’s lymphoma, and Ewing’s sarcoma have different clinical and radiographic features.