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What are the direct signs of blunt bowel and mesenteric injury?
Bowel wall discontinuity and pneumoperitoneum (mesenteric active contrast extravasation is not considered a direct sign but is highly specific for mesenteric injury).
Key images of the mesenteric injuries (1,3) with the following annotated images (2,4), resembling bucket-handle tears. Image 5 showing pelvic free fluid of increased attenuation (54 HU) in keeping with haemoperitoneum.