| − | Abdominal ultrasound shows a colon imapcted with faecal material. It may also reveal the cause in some cases such as foreign body, colonic mass or stricture. | + | Abdominal ultrasound shows a colon imapcted with faecal material. It may also reveal the cause in some cases such as foreign body, colonic mass or stricture. |
| | + | Abdominal radiographs reveal a colon filled with faecal material. Radiographs are not normally needed to make a diagnosis of colonic impaction as it can usually be identified on clinical exam, however in certain cases it can identify the cause. A fractured pelvis, dislocated hip, enlarged prostate and colonic or rectal mases can be found on radiographs. |