Gallstone

Cholelithiasis is the most common lesion in the biliary system. Depending on their location, there may be a distinction between gallstones, primary or secondary common bile duct stones, extrahepatic bile ducts or intrahepatic bile duct stones. However, in practice, stones in a single site are possible but not common. Often stones in several sites coexist in the same patient. Gallstones in patients with gallstones in Europe and the United States mostly occur in the gallbladder, and only a few cases (10% to 25%) are primary in the bile duct. However, in East and Southeast Asian countries including China, especially in China's vast coastal areas, most of the gallstones (50% to 90%) are primary bile duct stones. The gallstones in different parts generally have obvious differences in shape, size and composition, so it can be expected that the formation mechanism is different, and the clinical symptoms and pathological manifestations will also vary from person to person.