EUS for Starters -- Endosonographic Instrumentation -- Probe Ultrasonography -- Radial Endoscopic Ultrasound -- Linear Endoscopic Ultrasound -- The Cytopathology of Endoscopic Ultrasound-Guided Fine Needle Aspiration -- Pitfalls in Endoscopic Ultrasound -- EUS by Location -- The Role of EUS in Esophageal Cancer -- Role of EUS in Mediastinal Nodes, Masses, Cysts, and Lung Cancer -- The Role of Endoscopic Ultrasound in Gastric Cancer -- The Role of EUS in Subepithelial Lesions -- Endoscopic Ultrasound of Ampullary and Duodenal Lesions -- The Role of EUS in Pancreatic Cancer -- The Role of EUS in Cystic Lesions of the Pancreas -- The Role of EUS in the Biliary System -- The Role of EUS in Rectal Cancer and Fecal Incontinence -- Interventional EUS -- Interventional Endoscopic Ultrasound-Guided Cholangiopancreatography -- Endoscopic Ultrasound-Guided Drainage of Pancreatic Fluid Collections -- Endoscopic Ultrasound-Guided Celiac Plexus Block and Celiac Plexus Neurolysis -- Innovations in EUS -- Fine Needle Injection Therapy -- Contrast-Enhanced Endoscopic Ultrasound -- Endosurgical Applications of EUS -- The Future of EUS.