Pancreatic Failure: Etiologies, Clinical Features, and Management
Exocrine Pancreatic Insufficiency (EPI) & Endocrine Failure
"Pancreatic shutdown" refers to severe loss of exocrine (digestive enzymes) and/or endocrine (insulin/glucagon) function.
Major Etiologies
| Category | Causes |
|---|
| Chronic Pancreatitis | Alcohol (70%), genetic (PRSS1, SPINK1, CFTR), obstructive, idiopathic, autoimmune |
| Pancreatic Cancer | Ductal adenocarcinoma obstructing main duct; post-resection (Whipple) |
| Cystic Fibrosis | CFTR mutation → thick secretions obstruct ducts; 85-90% develop EPI |
| Autoimmune Pancreatitis | IgG4-related (type 1) or idiopathic duct-centric (type 2) |
| Surgical/Traumatic | Pancreatectomy, trauma, post-ERCP pancreatitis |
| Other | Severe acute pancreatitis (necrosis), hemochromatosis, Shwachman-Diamond, Zollinger-Ellison |
Clinical Presentation
Exocrine Insufficiency
- Steatorrhea (foul-smelling, floating, oily stools), weight loss, bloating, flatulence.
- Fat-soluble vitamin deficiency (A, D, E, K) → night blindness, osteopenia, coagulopathy.
Endocrine Insufficiency
- Diabetes mellitus (type 3c): brittle glucose control, hypoglycemia unawareness.
Diagnosis
- Gold standard: Fecal elastase-1 <200 μg/g (severe <100).
- Secretin stimulation test (reference, rarely used).
- Imaging: CT/MRI/MRCP for structural etiology.
Management
- Pancreatic Enzyme Replacement Therapy (PERT): Enteric-coated microspheres (lipase 25,000-40,000 U/meal, 10,000-25,000 U/snack); titrate to symptoms.
- Acid suppression (PPI) to prevent enzyme inactivation.
- Fat-soluble vitamin supplementation.
- Diabetes management: insulin preferred; avoid sulfonylureas (hypoglycemia risk).
- Alcohol cessation, smoking cessation, small frequent meals.
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