Small bowel obstruction accounts for 80% all mechanical intestinal obstruction; the remaining 20% result from large bowel obstruction.
An abdominal adhesion refers to a band of scar tissue (fibrous band or fibrous fatty tissue), most often occurring as a complication related to prior abdominal surgery. Adhesions interconnect loops of bowel or stick to the parietal peritoneum, mainly the abdominal wall and the sub-peritoneal organs.
In this case, the diagnosis was made based on the imaging appearances and the clinical history of previous abdominal/pelvic surgery.