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A 5-Year Experience of Benign Pancreatic Hyperenzymemia

Objective Benign pancreatic hyperenzymemia is characterized by a long-term increase of serum pancreatic enzymes in otherwise healthy subjects. This study was designed to determine (a) whether all pancreatic enzymes are elevated, (b) the extent of each enzyme increase, (c) the relative frequency of the familial form, and (d) the relative frequencies of pancreatic and salivary hyperamylasemia and macroamylasemia. Methods Two hundred seven asymptomatic subjects with benign pancreatic hyperenzymemia were studied during the 5-year period. Serum amylase, isoamylase, and lipase levels were assessed by immunoenzymatic assays. Results Most (n = 183; 88.4%) patients had benign pancreatic hyperenzymemia; 155 (74.9%) patients had an abnormal increase of all 3 enzymes, 15 (7.2%) patients of only lipase, and 13 (6.3%) patients of only amylase and pancreatic isoamylase. Lipase levels were the highest (1.1–21 times above upper limit). Of the 183 subjects, 72 were members of 35 different families, 15 (7.2%) had increased salivary amylase, and 9 (4.3%) had macroamylasemia. Wide day-to-day fluctuations of pancreatic enzymes, including falls within the reference ranges, were recorded. Conclusions All enzymes were increased in benign pancreatic hyperenzymemia, with lipase showing the highest elevation. Doctors should reassure patients about the benign nature of this condition and limit repeating useless examinations.