liver, gallbladder, and pancreas pathology · • gallbladder • pancreas. gi pathology outline...
TRANSCRIPT
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Liver, Gallbladder, and Pancreas PathologyKristine Krafts, M.D.
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GI Pathology Outline
• Esophagus• Stomach• Intestine• Liver• Gallbladder• Pancreas
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GI Pathology Outline
• Esophagus• Stomach• Intestine• Liver• Hepatitis• Alcoholic liver disease• Hemochromatosis• Wilson disease• Carcinoma
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• Caused by Hepatitis A, B, or C viruses
• Some cases asymptomatic
• Some cases symptomatic:• Acute (jaundice)• Chronic (may lead to cirrhosis and liver failure)• Fulminant (liver failure)
Viral Hepatitis
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Hepatitis A Hepatitis B Hepatitis C
Transmission Fecal-oral Body fluidsNeedles
Body fluidsNeedles
ChronicHepatitis None 5% >85%
Carcinoma No Yes Yes
Other stuff 50% of people > 50 are +
Vaccine effective
New drugs are promising
Bottom line Benign, self-limited disease
Most recover;small % die
Nasty! Almost 10% die
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Acute viral hepatitis
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Chronic viral hepatitis
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Chronic viral hepatitis: ground-glass hepatocytes
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Bilirubin metabolism
and elimination
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• Yellow discoloration of the skin due to hyperbilirubinemia (excess bilirubin in the blood)
• The amount of bilirubin in the blood depends on the rate of:• bilirubin production (from breakdown of red cells)• bilirubin uptake by the liver• bilirubin conjugation by the liver• bilirubin excretion into bile ducts
Jaundice
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• Conjugated bilirubin = water-soluble (excreted in urine)
• Unconjugated bilirubin = insoluble (toxic to tissues!)
• Causes of conjugated hyperbilirubinemia:• blockage in bile flow (e.g., tumor near bile duct)• congenital disorders affecting bile excretion
• Causes of unconjugated hyperbilirubinemia:• excess bilirubin production (e.g., massive hemolysis)• impaired bilirubin uptake by liver• Impaired bilirubin conjugation
Hyperbilirubinemia
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Jaundice
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Icterus
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Laboratory Tests
Hepatocyte integritySerum aspartate aminotransferase (AST)
Serum alanine aminotransferase (ALT)
Biliary functionSerum bilirubin (total and direct)
Serum alkaline phosphatase
Hepatocyte functionSerum albumin
Prothrombin time
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• Fibrotic, nodular liver
• Causes: alcoholism, hepatitis
• Leads to portal hypertension and liver failure
• Increased risk of liver carcinoma
Cirrhosis
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Cirrhosis
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Cirrhosis
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• Impaired flow of blood through liver
• Blood backs up in portal system
• Most common cause: cirrhosis
• Four main clinical consequences• ascites (↑ fluid in peritoneal cavity)• esophageal varices (dilated esophageal veins)• congestive splenomegaly• hepatic encephalopathy
Portal Hypertension
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Consequences of portal hypertension
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Esophageal varices
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Caput medusae (dilated periumbilical veins)
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Medusa
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• End point of severe liver disease
• Causes: fulminant hepatitis, cirrhosis, drug overdose
• Symptoms: jaundice, edema, bleeding, hyperammonemia
• Multiple organ-system failure• Hepatic encephalopathy• Hepatorenal syndrome
Liver Failure
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• Hematomas, gingival bleeding
• Jaundiced mucosa
• Glossitis (in alcoholic hepatitis)
• Reduced healing after surgery
Oral Manifestations of Liver Injury
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• 100,000 -200,000 deaths/year
• Effects on liver: steatosis, hepatitis, cirrhosis
• How much do you need to drink?• Short-term ingestion of 8 beers/day ®
reversible steatosis• Long-term ingestion of 5 beers/day ®
severe injury
Alcoholic Liver Disease
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More youth with irreversible liver disease now
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Alcoholic liver disease
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Alcoholic steatosis
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Alcoholic hepatitis: inflammation and Mallory bodies
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Alcoholic cirrhosis
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• Abstinence: 5ys is 90%
• Continued drinking: 5ys drops to 50-60%
• Causes of death in end-stage alcoholism:• Liver failure• Massive GI bleed• Infection• Hepatorenal syndrome• Hepatocellular carcinoma
Alcoholic Liver Disease
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• Autosomal recessive disease: body iron
• Cause: mutations in hemochromatosis gene (regulates iron absorption)
• Cirrhosis, skin discoloration, liver carcinoma
• Early detection and treatment (phlebotomy, iron chelators) = normal life expectancy
Hereditary Hemochromatosis
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Grey-brown skin discoloration in hemochromatosis
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• Autosomal recessive disease: body copper
• Cause: mutation in gene regulating copper excretion
• Symptoms: acute and chronic liver disease, neuropsychiatric manifestations, Kayser-Fleisher rings in cornea
• Treatment: copper chelation therapy
Wilson Disease
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Kayser-Fleischer Rings
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• Strongly associated with hepatitis B and C, chronic liver disease, and aflatoxins
• Rapid increase in liver size, worsening ascites, fever and pain
• alpha fetoprotein level
• Median survival 7 months (death from bleeding, liver failure, cachexia)
Hepatocellular Carcinoma
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Hepatocellular carcinoma
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Hepatocellular carcinoma
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• Most common malignancy in the liver
• Usually multiple lesions
• Most common primaries: colon, lung, breast, pancreas, stomach.
Metastatic Carcinoma
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Metastatic carcinoma
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GI Pathology Outline
• Esophagus• Stomach• Intestine• Liver• Gallbladder• Cholelithiasis• Cholecystitis
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• Common! (10% of adults in US)
• Cholesterol stones: Female, Fat, Fertile, Forty
• Pigment (bilirubin) stones: Asian countries, hemolytic anemia and biliary infections
• Symptoms: None, or excruciating pain
• Complications: cholecystitis (inflamed gallbladder), perforation, obstruction, pancreatitis
Cholelithiasis
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Cholesterol gallstones
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Pigmented gallstones
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GI Pathology Outline
• Esophagus• Stomach• Intestine• Liver• Gallbladder• Pancreas• Pancreatitis• Carcinoma
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• Exocrine pancreas• Makes enzymes for digestion• Diseases: pancreatitis, cystic fibrosis, tumors
• Endocrine pancreas• Makes insulin, glucagon, other hormones• Diseases: diabetes, tumors
Normal Pancreas
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• Acute inflammation and reversible destruction of pancreas
• Symptoms: abdominal pain radiating to back
• Main causes: alcoholism, gallstones
• Labs: elevated serum amylase and lipase
• Prognosis: Most recover, but 5% die in first week
Acute Pancreatitis
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Cell injury(alcohol)
Obstruction(gallstones)
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• Longstanding, irreversible pancreatic destruction
• Most are alcohol related, some idiopathic
• Symptoms: silent, or bouts of jaundice and pain
• Prognosis: poor (50% mortality over 20 years)
Chronic Pancreatitis
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• 4th leading cause of cancer death in US
• Biggest risk factor: smoking
• Highly invasive
• Silent until late; then pain, jaundice
• Very high mortality: 5ys <5%
Pancreatic Carcinoma
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Pancreatic carcinoma
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Pancreatic carcinoma