CASE 8 History: A 24-year-old man with muscular dystrophy developed acute abdominal distention 18 hours ago. 1. Which of the following should be included in the differential diagnosis for this patient? (Choose all that apply.) E. Colonic ileus (Ogilvie syndrome) 2. What is the most common form of volvulus seen in the colon? 3. What is the name of the radiologic sign seen at the site of torsion on contrast enema?