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Diverticulitis on ultrasound imaging: (a) in the site of tenderness descending colon show a diverticulum as a bowel outpouching (arrow) surrounded by echogenic and non-compressible fat (*) with mild hypervascularization on power Doppler study; (b) a localized abscess appears as a hypoechoic fluid collection (between calipers) inside the thickened colonic wall.
