The incidence of hiatal hernia increases with age and occurs in approximately 10% of the adult population. In patients undergoing upper gastrointestinal x-ray examination, with abdominal compression hiatus hernia was diagnosed in half of the patients undergoing the study. Approximately 95-99% of all hiatal hernias are type I (sliding) are either asymptomatic or cause symptoms of reflux that are treated by medicines.
The gallbladder concentrates and stores bile as a pear-shaped sac which it can release to help digestion after a fatty meal.