Approach to the investigation of gastrointestinal diseases; Laboratory evaluation of gastrointestinal disease; Imaging of the gastrointestinal tract, liver and pancreas; Gastrointestinal endoscopy; Gastrointestinal immunology; Biopsy: sample collection; Biopsy: handling, processing and interpretation; Dysphagia and regurgitation; Acute and chronic vomiting; Acute diarrhoea; Chronic diarrhoea; Malabsorption; Gastrointestinal haemorrhage; Dyschezia and tenesmus; Ascites; Jaundice; Hepatic encephalopathy; Infectious and parasitic diseases; Disorders of the oral cavity; Disorders of the pharynx and oesophagus; Diseases of the stomach; Diseases of the small intestine; Diseases of the colon and rectum; Disorders of the perineum and anus; Diseases of the exocrine pancreas; Diseases of the liver; Diseases of the biliary system; Critical care of patients with gastrointestinal disease; Feeding tubes; Therapeutics; Appendices; Index.