Overview: Pancreatic Dysfunction 

Pancreatic dysfunction results from impaired exocrine function (digestive enzyme secretion), endocrine function (insulin, glucagon), or both. The causes you listed affect different pancreatic components through inflammation, obstruction, autoimmune destruction, genetic defects, or metabolic stress. 

1. Pancreatitis 

Definition: Inflammation of the pancreas causing auto digestion by activated enzymes. 

Pathophysiology 

Premature activation of trypsinogen → trypsin inside acinar cells 
Leads to: 
Acinar cell injury 
Inflammatory cascade 
Oedema, necrosis, fibrosis (chronic cases) 

Aetiologies 

Acute pancreatitis 

Gallstones (obstruction of ampulla of Vater) 
Alcohol 
Hypertriglyceridemia 
Drugs (e.g., azathioprine, valproate) 
Post ERCP 

Chronic pancreatitis 

Long-term alcohol use 
Genetic (PRSS1, SPINK1) 
Autoimmune pancreatitis 

Resulting Dysfunction 

Exocrine insufficiency
 
↓ lipase → steatorrhoea 
Fat-soluble vitamin deficiency (A, D, E, K) 

Endocrine insufficiency 

“Type 3c diabetes” (pancreatogenic diabetes) 

Key Point:

Chronic pancreatitis causes irreversible fibrosis, not just inflammation. 

2. Pancreatic Obstruction 

Definition: Mechanical blockage of pancreatic duct outflow. 

Causes 

Gallstones 
Pancreatic carcinoma (especially head of pancreas) 
Chronic pancreatitis strictures 
Congenital anomalies (e.g., pancreas divisum) 

Pathophysiology 

Obstruction → ↑ intraductal pressure 
Impaired enzyme secretion 
Acinar cell atrophy 
Secondary inflammation and fibrosis 

Consequences 

Exocrine insufficiency (malabsorption) 
Post-obstructive pancreatitis 
Painless jaundice (if bile duct involved) 

Nursing/Clinical Focus 

Monitor for: 
Clay-coloured stools 
Dark urine 
Weight loss 
Fat malabsorption 

3. Diabetes Mellitus Type 1 

Definition: Autoimmune destruction of pancreatic β-cells. 

Pathophysiology 

T-cell–mediated immune response 
Progressive β-cell apoptosis 
Absolute insulin deficiency 

Impact on Pancreas 

Loss of endocrine function only 
Exocrine pancreas usually structurally intact 
Some patients show mild exocrine insufficiency due to trophic loss of insulin signalling 

Key Associations 

HLA-DR3, DR4 
Other autoimmune diseases (thyroid, coeliac) 

Key Point:

Insulin has a local paracrine effect on acinar cells—its absence can subtly impair digestion. 

4. Diabetes Mellitus Type 2 

Definition: Insulin resistance with progressive β-cell dysfunction. 

Pathophysiology 

Peripheral insulin resistance (muscle, liver, adipose) 
β-cell exhaustion and apoptosis over time 
Amyloid (IAPP) deposition in islets 

Pancreatic Effects 

Early: compensatory hyperinsulinemia 
Late: ↓ β-cell mass and insulin secretion 
Mild exocrine dysfunction may occur secondary to: 
Islet-acinar signalling disruption 
Fatty infiltration of pancreas 

Clinical Relevance 

Increased risk of: 

Pancreatitis 
Pancreatic cancer 
Often overlaps with metabolic syndrome 

5. Cystic Fibrosis 

Definition: Autosomal recessive disorder caused by CFTR gene mutation. 

Pathophysiology 

Defective chloride transport → thick, viscous secretions 
Obstruction of pancreatic ducts early in life 
Progressive acinar destruction and fibrosis 

Pancreatic Consequences 

Severe exocrine pancreatic insufficiency 
Fat and protein malabsorption 
Failure to thrive (children) 
Endocrine dysfunction: 
CF-related diabetes (CFRD) 

Key Point

CFRD shares features of both type 1 and type 2 diabetes but is pathophysiologically distinct. 

Summary Table 

 
Key Points for Clinical Practice 

Exocrine insufficiency = malabsorption → think steatorrhoea and weight loss 
Endocrine insufficiency = dysglycaemia 

Chronic pancreatic injury often affects both functions 
Early recognition improves nutritional status and glycaemic control