Elevated pancreatic enzymes describe a condition where the concentration of digestive enzymes produced by the pancreas, primarily amylase and lipase, exceeds normal limits. Average blood amylase levels range from 22-80 U/L, and lipase levels are typically 10-140 U/L. High pancreatic enzyme levels are an important indicator of structural damage to the pancreatic parenchyma, a disorder in pancreatic fluid secretion, or an obstruction in the pancreatic-biliary duct system. This obstruction prevents enzymes from entering the digestive tract, causing them to leak back into the bloodstream.

Dr. Le Khoa, a Level I Specialist in the Department of Hepatobiliary-Pancreatic Surgery at the Endoscopy and Endoscopic Surgery Center for Digestive Diseases, Tam Anh General Hospital in TP HCM, explains that amylase and lipase are two enzymes that aid in the breakdown of carbohydrates and lipids. When the pancreas is irritated, inflamed, or compressed, these enzymes can escape from the pancreatic duct into the bloodstream, rising rapidly within a few hours.

Dr. Le Khoa examining a patient. *Illustration: Tam Anh General Hospital*

Below are some common causes of elevated pancreatic enzymes.

Acute and chronic pancreatitis

During an episode of acute pancreatitis, digestive enzymes, whose role is to break down food, become activated. This activation leads to the destruction of pancreatic cells, releasing large amounts of amylase and lipase into the blood. Consequently, pancreatic enzyme levels can increase three to five times within the first 24-48 hours. If not treated promptly, acute pancreatitis can result in pancreatic necrosis, infection, and multi-organ failure.

In cases of chronic pancreatitis, pancreatic enzyme levels may show a slight increase or fluctuate during acute exacerbations. Prolonged damage can lead to fibrosis of the pancreatic parenchyma, reducing its ability to secrete enzymes and affecting digestive function. Patients with chronic pancreatitis face risks such as exocrine pancreatic insufficiency, fatty stools, weight loss, and impaired glucose metabolism.

Gallstones

The bile duct system and the pancreatic duct are anatomically closely linked. Gallstones from the gallbladder or bile ducts that migrate to the ampulla of Vater (major duodenal papilla) can easily obstruct the common outflow pathway for bile and pancreatic fluid. This obstruction increases pressure within the pancreatic duct, causing enzymes to accumulate and then enter the bloodstream.

Pancreatic tumors

Pancreatic tumors, whether benign or malignant, can compress the pancreatic duct, hindering the flow of pancreatic fluid. Head-of-pancreas cancer often causes early obstruction, with common symptoms including abdominal pain, jaundice, and mild to moderate elevation of pancreatic enzymes.

Cell damage from tumor growth or tissue necrosis also causes enzymes to be released into the blood. Certain neighboring tumors, such as those of the common bile duct, ampulla of Vater, or duodenum, can also directly affect pancreatic function.

Additionally, some non-pancreatic conditions can also elevate pancreatic enzymes. These include kidney failure, stomach diseases, intestinal diseases (such as peptic ulcers, diverticulitis, or a perforated stomach), and bile duct diseases (like cholecystitis or cholangitis). These conditions affect metabolism and excretion, leading to a systemic inflammatory response.

Thao Nhi