Fig. 1.

Colonic perforation within irreducible inguinal hernia.

A. Plain abdominal radiograph shows increased soft tissue density including suspicious bowel-gas (arrows) in left inguinal region with ileus of intraabdominal bowel loops.

B. Ultrasound of scrotum shows large heterogeneously echogenic mass (arrows) in left scrotum with little fluid collection.

C. Axial CT image shows tumor-like mass of sigmoid colon (arrow) within left scrotal sac, which is surrounded by multiple abscesses (asterisks).

D. Reformatted coronal CT image shows sigmoid tumor (T) herniating into left scrotal sac through inguinal canal (arrows) and causing dilatation of descending colon. No evidence of peritoneal contamination is observed.