1. Anatomy of the Biliary Tract.- 2. Bile Duct Cysts.- 3. Cystic Neoplasms.- 4. Benign Neoplasms of the Bile Ducts.- 5. Precursors of Cholangiocarcinoma.- 6. Intraductal Papillary Neoplasm of the Bile Ducts.- 7. Cholangiocarcinoma.- 8. Tumors of the Gallbladder.- 9. Tumors of the Ampulla Vater and Duodenal Papilla.