[Macroamylasemia or pancreatitis? A diagnostic problem].

Macroamylasemia is a condition characterized by a serum amylase activity increase due to complex macromolecules whose large size prevents its urinary excretion. It cannot be consistently correlated with any particular disease state, and should be regarded as a benign chemical derangement. The major clinical importance of macroamylasemia is the confusion of this condition with other causes of hyperamylasemia and its prevalence in the population, comprised between 1 and 2%. Macroamylasemia should be considered in any patient with elevated levels of serum amylase activity whose serum lipase and urine amylase levels are normal, in the face of unimpaired renal function. Confirmation rests on the demonstration of a macromolecular amylase component in the serum by means of chromatography, ultracentrifugation and electrophoresis. In this report, we, describe a patient with chronic liver disease caused by alcohol, occasional abdominal pain and persistent hyperamylasemia, though to be due to pancreatitis, but subsequently shown to be due to a macroamylase.