Pathology of Hepato-Biliary Flashcards

1
Q

Why do viruses lead to inflammation of the liver

A

Viruses target the hepatocytes causing inflammation and cell damage.

If severe, many cells die leading to liver failure due to function being unable to be maintained

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2
Q

How does the liver respond to excess alcohol

A

Alcohol disrupts FA metabolism leading to fat accumulation in the liver

Recurrent alcohol hepatitis progresses to cirrhosis

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3
Q

What is jaundice caused by

A

Excess circulating bilirubin

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4
Q

Pre-hep cause of jaundice

A

Haemolysis

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5
Q

Hep causes of jaundice

A

Cholestasis

Intra-hepatic bile duct obstruction

  • Primary biliary cholangitis
  • Primary sclerosing cholangitis
  • Liver tumours
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6
Q

What is cholestasis

A

Accumulation of bile within hepatocytes or bile canaliculi

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7
Q

Causes of cholestasis

A

Viral hep
Alcoholic hep
Liver failure
Drugs

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8
Q

What is PBC

A

Autoimmune condition where bile ducts become damaged by GRANULOMATOUS inflammation

Makes it more difficult for bile to be secreted

Progresses to cirrhosis

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9
Q

Diagnosis of PBC

A

Anti-mitochondrial auto-antibodies

Raised ALP

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10
Q

What is primary sclerosing cholangitis

A

Chronic inflammation and fibrous obliteration of bile ducts

NO GRANULOMAS

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11
Q

Post hep causes of jaundice

A

Cholelithiasis (gallstones)
Cholecystitis
Common bile duct obstruction

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12
Q

Risk factors for cholelithiasis

A

Obesity

Diabetes

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13
Q

What can occur in prolonged and severe acute cholecystitis

A

Empyema
Perforation of gallbladder
Biliary peritonitis - leakage of bile and pus into abdomen

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14
Q

What happens to the gallbladder in chronic cholecystitis

A

Fibrosis

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15
Q

Causes of common bile duct obstruction

A

Gallstones
Bile duct tumours
Stricture
External compression (i.e. by tumour)

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16
Q

Effects of common bile duct obstruction

A

Jaundice

No bile excreted into duodenum

Ascending cholangitis (infection of bile proximal to obstruction)

Secondary biliary cirrhosis if obstruction prolonged

17
Q

What is hepatic cirrhosis

A

End stage chronic liver disease

  • the response of the liver to chronic injury
18
Q

Cause of hepatic cirrhosis

A
Alcohol 
Hep B & C
Autoimmune hep
PBC
Haemochromatosis
Wilson's disease 
Obesity - DM
19
Q

Pathology of hep cirrhosis

A

Normal liver structure is lost and replaced with nodules of hepatocytes and fibrous tissue

20
Q

Complications of cirrhosis

A

Abnormal blood flow - PHTN as blood can’t make it through portal system

Increased risk of hepatocellulr carcinoma

21
Q

Types of liver tumours

A

Hepatocellular carcinoma (malignant tumour of hepatocytes)

Cholangiocarcinoma (malignant tumour of bile duct epithelium)

Metastatic tumour