What is a perimortem fracture, and how can you recognize it radiographically?

• A. A fracture occurring after death; recognizable by sharp fracture edges, minimal healing, and sometimes greenstick-like hinging.
• B. A fracture that has fully healed with thick callus.
• C. A fracture that shows no fracture line on radiographs.
• D. A fracture that only involves the skull.

Answer: (B)

Perimortem fractures reflect injuries that occur around the time of death when bone is still fresh and relatively elastic. Because the bone hasn’t had time to dry out and stiffen, the fracture patterns resemble those of living bone rather than brittle, weathered bone.

Radiographically, you look for sharp, clean fracture margins and fracture lines that show little to no healing. There may be features like hinging or small, intact fragments that indicate the bone was still pliable when it fractured. The fracture surfaces usually have a color and density consistent with the surrounding cortex, with no bridging callus or remodeling, since there hasn’t been time for healing.

In contrast, a description that a fracture is fully healed with a thick callus points to a fracture that occurred well before death and underwent healing; radiographs would show a bridging callus across the fracture line. Descriptions of postmortem breaks would typically show brittle, chalky edges with uneven density and no signs of living-tissue responses.

So, recognizing a perimortem fracture radiographically hinges on identifying fresh-like fracture surfaces, lack of healing, and possible hinging or bending consistent with a still-elastic bone at the time of injury.