Gastroenterology · Pancreatic Disorders
The facts most likely to be tested
Alcohol abuse is the most common cause of chronic pancreatitis in adults, while cystic fibrosis is the leading cause in children.
Patients classically present with chronic epigastric pain that radiates to the back and is often exacerbated by fatty meals.
Steatorrhea and fat-soluble vitamin deficiency (A, D, E, K) occur due to pancreatic exocrine insufficiency once >90% of pancreatic function is lost.
Pancreatic calcifications on abdominal imaging are the most specific finding for chronic pancreatitis.
Magnetic resonance cholangiopancreatography (MRCP) is the preferred initial diagnostic imaging modality to visualize ductal dilation and strictures.
Pancreatic enzyme replacement therapy (PERT) is the first-line treatment for managing malabsorption and associated pain.
Patients are at significantly increased risk for pancreatic adenocarcinoma, necessitating surveillance in high-risk individuals.
Vignette unlocked
A 52-year-old male with a 20-year history of heavy alcohol use presents to the clinic complaining of persistent, dull epigastric pain that radiates to his back. He reports that his stools have become foul-smelling, bulky, and difficult to flush. Physical examination reveals a thin, cachectic male with epigastric tenderness. Laboratory studies show a normal lipase level, but a fecal elastase test is significantly low. An abdominal CT scan demonstrates diffuse pancreatic calcifications and a dilated main pancreatic duct.
What is the most appropriate initial management for this patient's malabsorption?
Pancreatic enzyme replacement therapy (PERT)
The patient exhibits classic signs of pancreatic exocrine insufficiency (steatorrhea, low fecal elastase) secondary to chronic pancreatitis, which is managed with PERT to improve nutrient absorption.
Full handout
High yield triage
Etiology / Epidemiology
Primary cause is chronic alcohol abuse (70%); other causes include smoking, hypertriglyceridemia, and pancreas divisum.
Clinical Manifestations
Classic triad: steatorrhea, diabetes mellitus, and pancreatic calcifications on imaging.
Diagnosis
Abdominal CT is the initial test of choice; fecal elastase is the most sensitive test for exocrine insufficiency.
Treatment
Pancreatic enzyme replacement therapy (PERT) is first-line; alcohol cessation is mandatory.
Prognosis
High risk for pancreatic adenocarcinoma; patients require lifelong monitoring for malabsorption.
Full handout
Epidemiology & Etiology
Chronic pancreatitis is most common in middle-aged men with a history of heavy alcohol consumption. Smoking acts as a potent synergistic factor for disease progression. Other etiologies include hereditary pancreatitis (PRSS1 mutation), autoimmune conditions, and obstructive causes like pancreas divisum.
Pertinent Anatomy
The pancreas is a retroperitoneal organ; chronic inflammation leads to fibrosis and atrophy of the acinar cells. The duct of Wirsung often becomes dilated and irregular, containing protein plugs or stones.
Pathophysiology
Recurrent inflammation leads to irreversible fibrosis and loss of endocrine/exocrine function. The sentinel acute pancreatitis event hypothesis suggests repeated acute insults trigger a cascade of stellate cell activation. This results in ductal strictures and eventual pancreatic insufficiency.
Clinical Manifestations
Patients present with chronic, dull epigastric pain radiating to the back. Steatorrhea (foul-smelling, floating stools) indicates severe exocrine insufficiency. Weight loss and signs of fat-soluble vitamin deficiency (A, D, E, K) are common. The classic triad of calcifications, steatorrhea, and diabetes is present in only 20% of patients.
Diagnosis
The abdominal CT is the diagnostic study of choice to visualize pancreatic calcifications and ductal dilation. Fecal elastase levels <200 mcg/g confirm exocrine insufficiency. Endoscopic ultrasound (EUS) is the most sensitive modality for early-stage disease.
Treatment
Pancreatic enzyme replacement therapy (PERT) is the cornerstone of management to treat malabsorption. Patients must maintain a low-fat diet and achieve total alcohol cessation to prevent further damage. Insulin is required for patients who develop secondary diabetes. Opioids should be avoided due to high risk of addiction.
Prognosis
Patients face a significantly increased risk of pancreatic adenocarcinoma. Long-term management requires monitoring for osteoporosis due to vitamin D malabsorption and regular nutritional assessment.
Differential Diagnosis
Pancreatic Cancer: weight loss with painless jaundice
Peptic Ulcer Disease: pain relieved by food or antacids
Chronic Cholecystitis: RUQ pain with positive Murphy sign
Irritable Bowel Syndrome: absence of malabsorption markers
Celiac Disease: positive anti-tTG IgA antibodies