Gastrointestinal · Year 2 · from Gastrointestinal
Case 3: Chronic Pancreatitis with Exocrine Insufficiency
Patient Presentation
Demographics: 52-year-old male
Chief Complaint: Chronic abdominal pain, greasy stools, and weight loss
History of Present Illness: The patient reports 10 years of episodic epigastric pain radiating to the back, initially occurring after alcohol intake but now constant and requiring daily opioid analgesics. Over the past 2 years, he has developed oily, foul-smelling stools that are difficult to flush (3-4 per day). He has lost 30 pounds despite eating normally. He reports occasional symptoms of hypoglycemia.
Past Medical History: Recurrent acute pancreatitis (4 episodes over 12 years)
Social History: Heavy alcohol use for 25 years (6-8 beers daily, recently reduced), 30 pack-year smoking history
Physical Examination
- Vital Signs: BP 118/74 mmHg, HR 80 bpm, BMI 19
- General: Thin, cachectic male
- Abdomen: Epigastric tenderness, no masses, no peritoneal signs
- Extremities: Muscle wasting
Workup and Results
- CT Abdomen: Pancreatic calcifications, dilated pancreatic duct with "chain of lakes" appearance, parenchymal atrophy
- Fecal Elastase: 85 mcg/g (normal >200 mcg/g, indicating severe exocrine insufficiency)
- HbA1c: 7.8% (new diabetes)
- Fat-soluble Vitamins: Vitamin D 12 ng/mL (low), Vitamin A low-normal
CT scan demonstrating pancreatic calcifications (arrows) and ductal dilation characteristic of chronic pancreatitis with parenchymal atrophy.
Image Source: Case courtesy of Radiopaedia.org
Diagnosis
Chronic Pancreatitis with Exocrine and Endocrine Insufficiency
Clinical Correlation to Pancreatic Secretion Physiology
Chronic pancreatitis causes progressive destruction of acinar cells that produce digestive enzymes. Steatorrhea (fatty stools) develops only when exocrine function falls below 10% of normal, as the pancreas has significant reserve capacity. Without adequate pancreatic lipase (and its essential cofactor colipase), dietary triglycerides cannot be hydrolyzed to fatty acids and monoglycerides for micellar solubilization and absorption. The malabsorbed fat creates bulky, malodorous stools that float. Fat-soluble vitamin deficiencies (A, D, E, K) develop because these vitamins require fat absorption. Loss of bicarbonate-secreting duct cells contributes to maldigestion by failing to neutralize gastric acid in the duodenum. Endocrine insufficiency (diabetes) develops as islets are destroyed; this "pancreatogenic diabetes" is particularly brittle due to concurrent glucagon deficiency.
Treatment
- Absolute alcohol abstinence and smoking cessation
- Pancreatic enzyme replacement therapy (PERT) with meals (high-lipase formulations)
- Fat-soluble vitamin supplementation
- Low-fat diet for symptom control
- Diabetes management (typically insulin required)
- Pain management with non-opioid approaches when possible