Colon Cancer – Napkin ring sign The differential diagnosis for the “napkin ring” sign as presented above includes: 1) TB of colon, 2) carcinoma of colon, 3) metastasis, 4) diverticular stricture, 5) endometriosis, 6) ischemic stricture, 7)...
Acute Appendicitis Abdominal axial CT image showing dilatation of the appendix (arrow). [Courtesy of Dr. N. Jaffer]
Abdominal axial CT images showing an abscess (arrow) adjacent to the sigmoid colon (left image) and thickened sigmoid colon wall. [Courtesy of Dr. N. Jaffer]
Abdominal axial CT scan showing numerous cysts within the liver parenchyma. [Courtesy of Dr. N. Jaffer]
The US is of a liver. The hypoechoic areas represent the biliary system, whereas the hyperechoic regions are suggestive of steatohepatosis (fatty liver). The sharply delineated hyperechoic margin of the liver represents the diaphragm. [Courtesy of Dr. N. Jaffer]
