A 34-year-old man presents with a 6-month history of intermittent right lower quadrant abdominal pain, chronic diarrhea, and unintentional weight loss. He denies any rectal bleeding or fever. On examination, he has mild tenderness in the right lower quadrant but no rebound or guarding. A barium study is performed and reveals a “string sign.” Question: What does the “string sign” on radiographic imaging most likely indicate in this patient?
