Macroamylasemia.

Macroamylasemia, characterized by hyperamylasemia and a normal urinary amylase, has no known specific clinical symptoms. The disparity in serum and urinary amylase levels is due to a macromolecular amylase complex too large for glomerular filtration. This syndrome is presented in a patient with cholecystitis and a partial small bowel obstruction accompanied by persistent pre- and postoperative hyperamylasemia with proven macroamylasemia. The renal amylase clearance to creatinine clearance (CAM/CCR) ratio confirms this hyperamylasemic entity.