Intraductal tubulopapillary neoplasm of the bile duct, a precursor lesion to cholangiocarcinoma
Intraductal tubulopapillary neoplasm of the bile duct, a precursor lesion to cholangiocarcinoma
Histology of intraductal tubulopapillary neoplasm: Dilated bile duct with intraductal polypoid mass, composed of back-to-back tubular units and occasional papillary formation. The native bile duct epithelium is preserved.