Terminal ileitis and narrowing of the lumen due to mucosal thickening and rigidity of the bowel wall.
A pneumoretroperitoneum may be appreciated in each of the CT images presented above. In the left image, air is seen surrounding the right kidney, whereas the right image shows retroperitoneal air pushing the bowel centrally on the patient’s right side. [Courtesy...
Free air in the retroperitoneum makes retroperitoneal structures such as the psoas muscles and the kidneys visible. [Courtesy of Dr. N. Jaffer]
Free peritoneal air is difficult to assess in a single, supine, plain film study. However, in the study above, one can appreciate the air visualized on both sides of the left hemidiaphragm. [Courtesy of Dr. N. Jaffer]
Air both inside and outside of the bowel wall creates contrast effect enabling the visualization of both the inner and outer limits of the bowel wall. [Courtesy of Dr. N. Jaffer]
