Liver Disease Flashcards
what are the 9 subtypes of liver disease?
hepatitis cirrhosis alcoholic liver disease drug toxicity storage disease chronic liver disease autoimmune structural disease liver lesions
prevalence of viral hepatitis?
dec in HepC, inc in E & B
hep A is caused by the ___ ___ virus
Ebstein-Barre Virus
epidemiology of HepA?
faecal-oral spread, common in young
is HepA chronic?
no- mild illness with full recovery
ix for diagnosing HepA?
bloods (HepA IgM)
HepE is caused by _______ virus
cytomegalovirus
true/false…
HepE is clinically same as HepA
true
HepB is caused by _____ ____ virus
yellow fever virus
Hep E & A spread faecal-orally, what about HepB?
hepB spreads by blood, sexually, mother to child
is the incubation period for hep B long or short?
long
true/false…
the hep B virus causes direct damage to liver
False…
it is the antiviral immune response that causes the damage to the liver
if disease presents during childhood then it is more likely to be…
chronic
HBsAg antigen…
present for > 6 months in chronic infection
HBeAg…
present in highly infectious individuals (as is viral DNA)
HepB IgM…
present soon after becoming infected
HepB IgG…
present after a while of infection
anti-HBe antibody…
present in immunity
how to control spread of HepB?
minimise exposure, screening of pregnant women, vaccines
outcomes of hepB?
chronic hepatitis, cirrhosis, hepatocellular carcinoma,
what is important about HepD?
only found with hepB and exacerbates it (parasite of a parasite)
HepC is caused by the ____ _____ virus
herpes simplex virus
True/False…
HepC’s spread is similar to HepA & HepE
False…
HepA & E spread via faecal-oral
HepC (like HepB) spreads via blood & blood products
HepC is often asymptomatic but tends to do what?
waxes and wanes but tends to become chronic
ix for HepC?
test for antibody to HepC. if +ve do PCR for HepC RNA= if this is +ve then definitive dx of active HepC can be made
true/false…
there is no vaccine for HepC?
true
more than __ months means hepatitis is chronic
6 months
pathophysiology of acute & chronic hepatitis?
acute hepatitis can.. resolve, become chronic
chronic can.. become cirrhosis, cancer, liver failure or resolve
what is Mx for acute infection?
- monitor for complications
- notify public health
- immunisation of contacts
main complications of hepatitis?
cirrhosis, liver failure (acute or chronic), liver cancer
which 2 hepatitis infections may become chronic?
hepB & C
HepB & C chronic infection cure?
HepB= spontaneous cure HepC= once chronic infection is established so no cure
general timeline of complications following chronic hepatitis?
cirrhosis after 20 years, carcinoma after 30 years
tx for chronic hep?
- antivirals
- hepB: interferon alfa (peginterferon injection)
- hepC: oral course of 2/3 antivirals - vaccines
- infection control
- hepatocellular carcinoma screening
when should antivirals be given in chronic hepatitis?
HepC= always HepB= if high HBV DNA present in serology
common causes of acute liver failure?
viruses, alcohol/drugs, bile duct obstruction
what is cirrhosis?
bands of fibrosis separating regenerative nodules of hepatocytes & alteration of hepatic micro-vasculature so loss of hepatic function
aetiology of cirrhosis?
alcohol, HBV & C, haemochromatosis, AI disease, gallstones, NASH? NAFLD
common complications of cirrhosis?
portal HT, ascites, encephalopathy, vatical bleeding
pathophysiology of ascites?
- portal circulation disrupted by cirrhosis
- inc in portal pressure
- lack of portal blood flow causes liver to inc production of vasodilators
- inc in CO but low SVR so low MAP
- baroreceptors activated to inc MAP
- sympathetic system activated & renin-angiotensin pathway to inc SVR
- inc CO & high H2O retention
space to store extra water ran out to ascites
Dx for ascites
shifting dullness on examination and USS
Tx for ascites
low Na diet, no NSAIDs, diuretics*, paracentesis/TIPSS/ transplant
what diuretic is given in ascites?
spironolactone
what is TIPSS?
stenting of hepatic vein
complication of ascites??
spontaneous bacterial peritonitis- dx with ascites tap and tx is Antibiotics
what are symptoms of encephalopathy?
mental confusion hand flap, slow tremor when grasping 2 fingers
pathogenesis of encephalopathy?
microglial inflammation 2y to ammonia metabolism
tx for encephalopathy?
lactulose (clear gut), maintain nutritional status, if spontaneous consider transplantation
variceal bleeding is most common at…?
oesophagus
what score is used in variceal bleed assessment?
CHILD’s score
A= normal, C= jaundiced
tx for variceal bleed?
b blockers and variceal ligation
acute tx for upper GI bleed due to variceal bleed?
resuscitate, terlipressin (reduces portal pressure), endoscopy & TIPS
- if bleeding can’t be controlled perform a balloon tamponade
what type of drug is terlipressin?
vasoconstrictor
common complication of varicese in cirrhotic patients?
thrombosis
2 classes of cirrhosis?
compensated: image abnormalities but no s/s
decompensated: acute liver failure- usually caused by infection or end stage liver disease
signs for decompensated cirrhosis?
jaundice, ascites, encephalopathy, rising, leukonychia
what is leukonychia?
white discolouration of nails
tx for cirrhosis?
remove/ treat underlying cause
nutrition: high energy intake and vitB supplements, fed state maintenance
transplant
what score is used to assess ability to receive transplant?
UKELD
what condition may cause cardiac cirrhosis?
constrictive pericarditis
ix for any alcoholic liver disease?
biopsy
pathology of alcoholic liver disease?
fatty liver (reversible) > hepatitis (reversible, wks of abuse) > fibrosis (irreversible, mnths) > cirrhosis (end stage, yrs)
histological pathology of alcoholic hepatitis
hepatocyte necrosis, mallory bodies, pericellular fibrosis
what grading system is used for alcoholic hepatitis?
Turcotte-Pugh Grading
- bilirubin >80
- AST < 500
- AST:ALT > 1.5
hepatomegaly & fever *
outcomes of alcoholic liver disease ?
cirrhosis, Portal HT, malnutrition, hepcel carcinoma
what does NASH stand for?
Non-alcoholic Steatohepatitis
pathology of NASH?
identical to alcoholic liver disease
risk factors/ aetiology for NASH?
diabetes, obesity, hyperlipidaemia
what can drug toxicity cause?
hepatitis, granulomas, fibrosis, necrosis, failure, cholestasis, cirrhosis
what drug is commonly responsible for drug toxicity?
methotrexate
what is methotrexate given for?
psoriasis & RA
what does methotrexate cause?
fibrosis
true/false…
methotrexate toxicity presents with a rash and ascites
false…
no clinical signs
all storage diseases of the liver are…
genetic and are autosomal recessive
what are the 3 storage diseases of the liver?
haemochromatosis, Wilson’s disease, alpha-1-antitrypsin deficiency