[Morphology and morphogenesis of cancer of the gallbladder and extrahepatic biliary ducts].

The article presents a survey of the problems of pathological anatomy, morpho- and histogenesis of cancer of the gallbladder and extrahepatic biliary ducts. Data on the role of inflammatory epithelial hyperplasias, adenomatous polyps in the subsequent malignancy of the biliary tract mucosa are presented. Problems of squamous-cell carcinoma of this localization are discussed. Results of experimental studies of tumours of the biliary ducts are presented.