Abdominal ultrasound reveals a distended large colon with thickened, oedematous walls. Peritoneal fluid should be sampled under ultrasound guidance, typical changes include an increase in protein and cellular content. | Abdominal ultrasound reveals a distended large colon with thickened, oedematous walls. Peritoneal fluid should be sampled under ultrasound guidance, typical changes include an increase in protein and cellular content. |