Colonic intussusception secondary to a calcium phosphate bezoar in a child receiving calcium carbonate for hyperphosphatemia

We report a case of a calcium phosphate bezoar resulting in colonic intussusception in a boy with chronic renal failure who received calcium carbonate to control hyperphosphatemia. Because of concerns about aluminumrelated disease in patients receiving aluminum hydroxide phosphate binders, calcium carbonate is being used more frequently to manage phosphate retention in renal failure. The development of bezoars may complicate this new form of therapy.