Perforated sigmoid colon diverticulitis initially presenting with pneumoperitoneum, pneumoretroperitoneum, and pneumomediastinum: A case report

Figure 1 Selected images from non-enhanced computer tomography of the abdomen. A: Perforation of the sigmoid colon (arrow); B: Pneumoretroperitoneum around pancreas and kidney (arrow); C: A lung window setting demonstrating pneumomediastinum (arrow); D: Computer tomography scan sagittal view showing pneumomediastinum, pneumoperitoneum, and pneumoretroperitoneum (arrows).

Figure 2 Intra-operative picture. A: Sigmoid colon diverticulitis with necrotic change (arrow); B: Retroperitoneal space abscess formation, favor mesenteric site diverticulitis perforation related (arrow); C: Blunt dissection of retroperitoneal space performed with finger (arrow).