Large ileocolic collection containing fluid and gas in the right iliac fossa, abutting the inflamed terminal ileum. It has a well-defined wall with thickening and enhancement and measures 10.6 x 6.8 x 8.7 cm, displacing the inflamed ileum superiorly and posteriorly. The anterior and lateral borders abut the abdominal wall, with no intervening bowel loop suggesting percutaneous drainage would be feasible.
Multiple smaller collections with enhancing walls:
- On the medial aspect of the inflamed terminal ileum, an adjacent collection measures 1.6 x 2.7 cm.
- Semilunar shaped right pelvic collection measures 4.2 x 2.3 cm and appears to communicate with the larger right iliac fossa collection more superiorly.
- A small left iliac fossa collection anterior to the external iliac vessels measuring 2.0 x 2.8 cm. Adjacent sigmoid colonic bowel thickening suggests either reactive colitis or an inflammatory skip lesion.
No bowel dilatation. Retroperitoneal oedema and fat stranding is noted, particularly surrounding the psoas muscles. Small amount of intraperitoneal fluid surrounding the liver and spleen. Cholelithiasis. No sacroilitis.