Doctors have known what gallstones are made of—cholesterol and calcium salts, if you're curious—for a long time. But they didn't know exactly how everything was glued together, until a study published in September in the journal Immunity. Scientists examined "sludge," fluid taken from human gallbladders.
"We studied the formation of gallstones and found that white blood cells are responsible for the clumping of crystalline matter in the gallbladder," says Martin Herrmann, PhD, an immunologist at the University Hospital Erlangen in Germany. "The clumped material then forms the more or less spherical aggregates, which appear as gallstones. The knowledge of this process could open up new treatment options for recurring gallstone disease in the future."
https://www.msn.com/en-us/health/medical/15-things-we-learned-about-the-human-body-in-2019/ss-BBX8dwd#image=10
