Gallstones are lumps of solid material that form in your gallbladder. They are made when the digestive juice called bile gets hard and stone-like.

A gallbladder scan is an imaging test to look at your gallbladder and see how well it is working.  This test may also be called a liver-biliary scan because the doctor often looks at the liver at the same time.

A cholecystectomy is surgery to remove your gallbladder.