<Li> Calculi in the urinary system are called urinary calculi and include kidney stones (also called renal calculi or nephroliths) and bladder stones (also called vesical calculi or cystoliths). They can have any of several compositions, including mixed . Principal compositions include oxalate and urate . </Li> <Li> Calculi of the gallbladder and bile ducts are called gallstones and are primarily developed from bile salts and cholesterol derivatives . </Li> <Li> Calculi in the nasal passages (rhinoliths) are rare . </Li> <Li> Calculi in the gastrointestinal tract (enteroliths) can be enormous . Individual enteroliths weighing many pounds have been reported in horses . </Li>

A stone or calculus in the nose is called