redundant colonic segment as a post surgical complication

Large air filled, thin walled bowel like structure in the left subphrenic space measuring approximately 12 cm in diameter with loop like configuration and apparent communication with the splenic flexure of colon with afferent and efferent loops — the leading considerations include: A chronically dilated, ‘redundant colonic segment’ possibly in proposed or sequestered due to adhesions related to prior intervention.
Other possibilities include a ‘giant colonic diverticulum’.
No evidence of discrete collection or abnormal bowel dilatation or air fluid levels in this study.