ABSTRACT
This chapter provides Physiology, Upper gastrointestinal conditions, Malabsorption, Gastroenteritis, Diarrhoea, Chronic abdominal pain, Peptic ulcer, Inflammatory bowel disease, Constipation, Pancreatitis, Gastrointestinal tract bleeding, Gastrointestinal tract tumours, Faltering growth, Nutritional disorders, and Eating disorders. It discusses the listed diseases of Clinical features, Investigations, Management, causes, and complications Gastro-Oesophageal Reflux is the passage of gastric contents involuntarily into the oesophagus. It is the result of an incompetent lower oesophageal sphincter, usually secondary to immaturity. Malabsorption may be generalized or specific where individual transport mechanisms or enzymes are defective. Generalized malabsorption presents with faltering growth and steatorrhoea. Specific malabsorption may present with different features. Post-gastroenteritis intolerance is a transient condition, occurring after acute gastroenteritis and resulting in persistent diarrhoea. They have usually developed a temporary intolerance to lactose secondary to cow’s milk protein sensitization and villous damage.
