CT abdomen and pelvis
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Computed tomography reveals areas of increased density pericolonic fat in relation to multiple diverticula at sigmoid and descending colon segment. Posteromedially a 2 cm mulitloculated collection of gas is larger than other diverticuli and is the center of stranding, and appears to displace the bowel lumen anterolaterally. It likely represents a contained perforation. Alternatively it may represent a particularly large diverticulum. No collections and no free intrabdominal gas.
Images consistent with an acute diverticulitis.