CTICasesDiaphragmatic Crus Hematoma
Imaging findings
Chest and abdominal CT in a patient post motor vehicle crash shows marked, focal thickening and hyperdensity of the right diaphragmatic crus, representing a crus hematoma. Associated lower rib fractures, liver laceration, and hemoperitoneum are also present.
Key takeaways
Trauma to the lower chest and upper abdomen can cause focal hemorrhage and hematoma within the diaphragmatic crus. This manifests on CT as marked thickening and increased density of the crus (the seatbelt sign). It is typically treated conservatively and heals spontaneously, but can be a marker of significant intra-abdominal injury.
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