CT appearance of sclerosing cholangitis

Area of Science:

• Radiology
• Hepatology
• Gastroenterology

Background:

• Sclerosing cholangitis encompasses primary and secondary forms.
• Distinguishing sclerosing cholangitis from other biliary obstructions on imaging is clinically important.

Purpose of the Study:

• To identify characteristic CT findings in sclerosing cholangitis.
• To differentiate sclerosing cholangitis from other causes of biliary obstruction using CT.

Main Methods:

• Retrospective review of CT examinations in ten patients with sclerosing cholangitis.
• Comparison of CT findings with cases of biliary obstruction due to tumor, stone, or inflammatory mass.

Main Results:

• Sclerosing cholangitis cases showed similar, specific liver abnormalities on CT.
• These findings differed from those in tumor, stone, or inflammatory mass-induced biliary obstruction.
• Focal, discontinuous minimal intrahepatic biliary dilatation without mass lesions was observed.

Conclusions:

• CT findings of focal, discontinuous intrahepatic biliary dilatation without mass lesions are highly suggestive of sclerosing cholangitis.
• This CT appearance is distinct from common biliary obstruction causes.
• Diffuse cholangiocarcinoma may present a similar CT appearance, but is rare.