Chronic pancreatitis is a long-lasting condition where the pancreas becomes inflamed, scarred, and gradually loses its ability to function properly. Early recognition and proper testing are crucial for managing this progressive disease that affects digestion and blood sugar control.

Introduction: Who Should Undergo Diagnostics

If you experience ongoing pain in the upper part of your belly that may spread to your back, especially after eating or drinking alcohol, you should consider seeking diagnostic testing for chronic pancreatitis. This condition develops when inflammation of the pancreas does not heal but instead continues or keeps coming back, causing permanent damage over time.^[1]

People who have had repeated episodes of acute pancreatitis—which is sudden inflammation of the pancreas—should particularly pay attention to symptoms that don’t fully resolve. About 8 out of every 100 people with acute pancreatitis may eventually develop the chronic form of the disease.^[7] Adults between 35 and 55 years of age are most commonly diagnosed, and men are affected more often than women.^[6]

You should seek medical evaluation if you notice symptoms such as persistent belly pain, unexplained weight loss despite eating normally, or fatty stools that are unusually smelly, oily, and difficult to flush away. These signs suggest your pancreas may no longer be producing enough digestive enzymes. Additionally, symptoms like excessive thirst, frequent urination, and fatigue could indicate that your pancreas is not making enough insulin, leading to diabetes.^[4]

It’s important to note that chronic pancreatitis symptoms can be similar to other conditions such as irritable bowel syndrome or gallstones. Therefore, proper diagnostic testing is essential to determine the exact cause of your symptoms and rule out other possibilities.^[4]

Those with a history of heavy alcohol consumption over many years should be especially vigilant about symptoms, as this is the most common cause of chronic pancreatitis, accounting for about 70% of cases in adults.^[6] Similarly, people who smoke tobacco are at increased risk, as smoking is recognized as harmful to the pancreas.^[7] Even if you don’t have obvious symptoms yet, discussing screening options with your doctor may be wise if you have these risk factors.

Diagnostic Methods

Diagnosing chronic pancreatitis can be challenging because there is no single test that definitively confirms the condition. Instead, doctors use a combination of medical history, physical examination, blood tests, and imaging studies to build a complete picture. Your healthcare provider will need to rule out other possible causes of your symptoms first, as the signs of chronic pancreatitis can overlap with other digestive disorders.^[4]

Medical History and Physical Examination

Your doctor will begin by asking detailed questions about your symptoms, including when the pain started, what makes it better or worse, and how it affects your daily life. You will be asked about your alcohol consumption habits and whether you have a family history of pancreatic disease or conditions like cystic fibrosis. The doctor will examine your belly by pressing on different areas to check for tenderness or pain.^[2]

During the physical exam, your doctor will also check if your skin and eyes appear yellow, which could indicate a liver problem or blockage in the bile ducts. They will weigh you to determine if you’re underweight, which might suggest malnutrition from your pancreas not producing enough digestive enzymes.^[4]

Blood Tests

Blood tests play an important role in diagnosing chronic pancreatitis, although they may not always show clear abnormalities, especially in early stages. Your doctor will look for elevated levels of two pancreatic enzymes called amylase and lipase. When the pancreas is inflamed or damaged, these enzymes can spill into the bloodstream.^[2]

Additional blood tests may be performed to check for complications or other causes of your symptoms. These can include tests to measure blood sugar levels (to detect diabetes), calcium levels, triglyceride levels, and vitamin levels—particularly vitamins A, D, E, and K, which may be low if your body is not absorbing fats properly. Blood tests can also check for certain genetic conditions or autoimmune disorders that might be causing pancreatitis.^[2]

One specific blood test, called serum IgG4, can help diagnose autoimmune pancreatitis, which occurs when your immune system mistakenly attacks your pancreas. Genetic testing may be recommended if other common causes are not found or if there is a family history of pancreatic disease.^[5]

Stool Tests

Testing a sample of your stool can reveal important information about how well your pancreas is functioning. A fecal fat test measures the amount of fat in your stool. When your pancreas cannot produce enough digestive enzymes, your body cannot properly break down and absorb fats from food, leading to excess fat in the stool.^[5]

Another stool test measures pancreatic enzyme levels, specifically an enzyme called elastase. Low levels of fecal elastase suggest that your pancreas is not producing enough digestive enzymes, a condition called pancreatic insufficiency.^[15]

Imaging Studies

Imaging tests allow doctors to see the structure of your pancreas and identify changes such as swelling, scarring, calcium deposits, stones, or cysts. Different imaging techniques provide different types of information, and your doctor may order more than one type depending on what they find.

Contrast-enhanced computed tomography (CT) scan is generally the recommended first imaging study when chronic pancreatitis is suspected. This test uses X-rays and a computer to create detailed three-dimensional images of your pancreas. CT scans can show swelling, scarring, calcium deposits (calcifications), or other structural changes in the pancreas. However, CT scans may not detect early stages of the disease when changes are still subtle.^[6]

Abdominal ultrasound uses sound waves to create images of the pancreas and other organs in your belly. This test is non-invasive and does not use radiation, but it may not provide as much detail as other imaging methods, especially if your pancreas is deep in your abdomen or obscured by other organs or gas in the intestines.^[2]

Magnetic resonance imaging (MRI) and a specialized type called magnetic resonance cholangiopancreatography (MRCP) use powerful magnets and radio waves to create detailed images of soft tissues, including the pancreas and its ducts. MRCP is particularly useful for visualizing the pancreatic ducts and bile ducts without using invasive procedures. These tests can detect irregularities, narrowing, or blockages in the ducts that might not be visible on CT scans.^[5]

Endoscopic ultrasound (EUS) is a specialized procedure that combines endoscopy with ultrasound imaging. A thin, flexible tube with an ultrasound device on its tip is passed through your mouth, down your throat, through your stomach, and into the upper part of your small intestine, where it sits very close to the pancreas. This proximity allows for extremely detailed images of the pancreatic tissue and duct system. EUS can detect early changes that other imaging methods might miss, and it also allows doctors to take tissue samples (biopsies) if needed.^[6]

EUS is generally favored over another procedure called endoscopic retrograde cholangiopancreatography (ERCP) for diagnostic purposes because it is safer and provides better views of both the pancreatic tissue and ducts. ERCP involves inserting an endoscope through the mouth to the point where the pancreatic duct and bile duct empty into the small intestine, then injecting dye to visualize the ducts on X-rays. While ERCP is excellent for identifying duct problems and can also be used therapeutically to treat blockages or place stents, it carries more risks of complications than EUS.^[6]

Gastroscopy, also called upper endoscopy, may be performed to examine the inside of your esophagus, stomach, and upper small intestine. A thin tube with a camera is passed down your throat to look for any abnormalities or complications related to pancreatitis.^[4]

Pancreatic Function Tests

Specialized tests can directly measure how well your pancreas is working. One such test measures the level of bicarbonate, a substance the pancreas produces to neutralize stomach acid. This test is performed in select patients when other diagnostic methods are inconclusive.^[15]

Another test called serum trypsinogen measures a pancreatic enzyme precursor in the blood. Abnormal levels can indicate pancreatic dysfunction.^[5]

Diagnostics for Clinical Trial Qualification

When patients with chronic pancreatitis are considered for participation in clinical trials, they typically need to undergo a comprehensive set of diagnostic tests to confirm their diagnosis, assess disease severity, and ensure they meet specific study criteria. These baseline assessments help researchers determine if a patient is suitable for the trial and provide data for monitoring changes during the study.

Standard diagnostic criteria often include imaging evidence of chronic pancreatitis. CT scans are commonly used because they can reliably show structural changes such as calcifications, duct dilation, atrophy (shrinkage) of the pancreas, and the presence of cysts or stones. The degree of these changes helps classify disease severity.^[6]

Clinical trials may require documentation of pancreatic insufficiency through fecal elastase testing or other measures of enzyme production. This confirms that the pancreas has lost significant function, which typically occurs when more than 90% of the organ is damaged.^[1]

Blood tests are essential for trial enrollment. These establish baseline values for pancreatic enzymes (amylase and lipase), blood sugar levels (to identify or rule out diabetes), nutritional status (including vitamin levels), and general health markers such as kidney and liver function. Genetic testing may be required if the trial focuses on specific inherited forms of pancreatitis or if researchers want to exclude certain genetic conditions.^[2]

Advanced imaging such as MRI or MRCP may be required to provide detailed mapping of the pancreatic ducts and surrounding structures. EUS with or without biopsy might be necessary to characterize the extent of tissue damage and rule out cancer, which is an important exclusion criterion for many trials since people with chronic pancreatitis have an increased risk of developing pancreatic cancer.^[6]

Documentation of symptoms is crucial for trial participation. Patients may need to complete detailed questionnaires about pain intensity, frequency, and impact on daily activities. They may also need to record information about digestive symptoms, stool characteristics, weight changes, and overall quality of life. This information helps researchers measure whether experimental treatments improve patient outcomes.^[1]

Some trials require evidence of a patient’s drinking and smoking history, including confirmation of current abstinence if the trial requires participants to have stopped using alcohol or tobacco. This might involve additional blood tests or other verification methods.

Patients being considered for trials testing pancreatic enzyme replacement therapy will need thorough documentation of malabsorption symptoms and objective evidence from stool tests showing excess fat or low enzyme levels. Nutritional assessments, including measurements of body mass index and specific nutrient deficiencies, may also be required.^[6]