This article was supported by the National Natural Science Foundation of China(Grant No.81101061);the 1.3.5 Project for Disciplines of Excellence,West China Hospital,Sichuan University(Grant No.ZYJC18037).
A 57-year-old male presenting with spontaneously relieved abdominal cramp and distension was admitted to theWest China Hospital.The diagnosis remained unclear after colonoscopy and computed tomography.Double contrast-...