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Fig. 7B —77-year-old woman with chronic diverticulitis who presented
with 8-month history of left lower quadrant pain but no fever, leukocytosis,
or abdominal tenderness or rebound. Axial image from unenhanced (because of
clinical suspicion of urinary tract calculus) abdominal CT obtained 4 months
after A shows inflammatory collection (white arrow) abutting
distal colon (black arrow). Also note gas-filled colonic diverticula.
Acute diverticulitis is more likely to be associated with pericolic
inflammatory collections, whereas chronic diverticulitis is more likely to be
associated with relatively long segments of circumferential luminal narrowing
on barium enema and CT.
