A History of Endoscopic Ultrasonography -- Basic principles and fundamentals of EUS imaging -- Learning EUS anatomy -- EUS instruments, room setup, and assistants -- EUS procedure consent and sedation -- The EUS report -- Endosonography of the mediastinum -- Linear-array EUS: normal anatomy -- High-frequency ultrasound probes -- EUS elastography -- Fundamentals of EUS FNA -- EUS FNA cytology : material preparation and interpretation -- EUS : applications in the mediastinum -- EUS for esophageal cancer -- EUS of the stomach and duodenum -- EUS for gastrointestinal subepithelial masses -- EUS and its emerging modalities for diagnosis and staging of pancreatic tumors -- EUS for pancreatic cysts -- The role of diagnostic EUS in inflammatory diseases of the pancreas -- Autoimmune pancreatitis -- EUS for biliary diseases -- EUS endohepatology in liver disease -- Colorectal EUS -- Therapeutic EUS for cancer treatment -- EUS-guided biliary access -- Pancreatic fluid collection drainage -- EUS-guided enteric anastomoses -- EUS guided drainage of pelvic fluid collections -- EUS hemostasis -- Training in EUS -- The future of EUS.