JOHN RADCLIFFE HOSPITAL / SCIENCE PHOTO LIBRARY. JOHN RADCLIFFE HOSPITAL / SCIENCE PHOTO LIBRARY.
Large gallstone (8cm in diametre) extracted from a patient. Gallstones are a hard mass composed of bile pigments, cholesterol & calcium salts. The formation of gallstones (called cholelithiasis) occurs when the physical characteristics of bile alter so that cholesterol is less soluable. Chronic inflammation of the gall bladder may be a contributory factor. They may exist for years without causing problems, or they may cause severe pain. They are treated by surgical removal of the gall bladder or the stones themselves.
Model release not required. Property release not required.