Non-contrast CT shows hyperdense linear material at the colorectal anastomosis site ("stapled" surgical technique), adjacent to which a small focus of trapped, extraluminal air is seen. Extensive pneumoperitoneum and a small amount of free peritoneal fluid are also present.
Portal venous phase with rectal contrast material administration shows extravasation of bowel contrast into the extraluminal air mentioned earlier. A thin, discrete track is also observed (arrow on annotated image), as well as two small peripheral enhancing fluid collections close to the surgical site.
Multiple metastatic liver nodules, multiple homeostatic clips, aortic atherosclerosis, a left renal cyst (Bosniak I) and signs of vertebral column degenerative disease are additional findings.