Comparison of intraductal ultrasonography findings between primary sclerosing cholangitis and <scp>IgG4</scp>‐related sclerosing cholangitis

Abstract

The IDUS findings differed between PSC and IgG4-SC. Irregular inner margin, diverticulum-like outpouching, and disappearance of three layers are specific IDUS findings for PSC compared to IgG4-SC. IDUS is a more useful procedure than ERC for the early detection of diverticulum-like outpouching.