Background : large-bowel obstruction (LBO) is an abdominal emergency, with high morbidity and mortality rates if left untreated While LBO may develop over a protracted period of time, the clinical presentation is often acute and includes abdominal pain, constipation or obstipation, and abdominal distension . The marked distension of colon proximal to the level of obstruction leads to mucosal edema, bowel ischemia, and, if not treated, bowel infarction and perforation. In general, we have 3 types of large bowel volvulus. among this sigmoid volvulus is the most common type. In Ethiopia there is no published data about imaging pattern of large bowl volvulus as well as in Africa