A 68-year-old woman with diverticular disease presents with acute left lower quadrant pain and fever. CT abdomen shows pneumoperitoneum with gas predominantly in the paracolic gutter and pelvis. Which imaging feature best distinguishes perforation of a sigmoid colon diverticulum from perforation of a sigmoid colon carcinoma?

See the options, answer & explanation

Sign in free to reveal the answer choices, the correct answer, the detailed explanation, and AI-powered insights for this question.