Pancreatic Exocrine Insufficiency (PEI) - Diagnostic Algorithm
PEI definite:
 • Total pancreatectomy
 • Severe chronic pancreatitis
 • Tumour destroying head of pancreas
 • Acute pancreatitis destroying head of pancreas
PEI possible:
 • Mild and moderate chronic pancreatitis
 • After severe acute pancreatitis
 • After Whipple procedure
 • Cystic fibrosis
 • Gastrectomy with postprandial asynchrony
 • Vitamin A, E, D, K deficiency
PEI unlikely:
 • IBS
 • Coeliac disease
 • IBD
 • Weight loss in older people
 • Type 2 diabetes
 • Bowel resection

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