The 35 essays collected here report on many new diagnostic and therapeutic aspects of endoscopy. The topics covered include endoscopic ultrasonography, videoendoscopy, percutaneous endoscopic gastronomy tube placement, hydrostatic dilators and overtubes. A special section is devoted to biliary stent, balloon dilation of biliary strictures, and nasobiliary drains. In addition, the various methods for achieving hemostasis in gastrointestinal bleeding are reviewed and an endoscopic videoquiz is provided.