B5.026 - Liver Disorders 2 Flashcards
causes of viral hepatitis
EBV
CMV
Yellow fever
herpes
viral hepititis
herpes hepatitis features
immunocompromised pts
patchy coagulative necrosis, no particular zonal distribution
eosinophilic intranuclear inclusions
3 M’s of Herpes
Multinucleation
Molding
Margination
CMV hepatitis features
mostly after renal and liver transplant
immunocompetent people - mono with mild hepatitis
histo of CMV hepatitis
focal hepatocyte necrosis, microabscesses, occasional sinusodal lymphocytic infiltration, owls eye
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CMV hepatitis
intranuclear inclusions
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microabscesses in CMV hepatitis
feature of EBV hepatitis
immunocompetent and compromised
diffuse sinusoidal lymphocytic infiltrate with varying degrees of portal inflammation “string of pearls”
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sinusoidal lymphoctytosis in EBV hepatitis
hepatitis A features
endemic in countries with substandard sanitation
sporadic
fecal oral
1992
hepatitis B features
1/3 world pop infected
chronic or acute
transmission of HBV
perinatal
sexual contacts
IV drugs
transfusion
natural history of HBV
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injury from HBV
injury caused by CD8+ cytotoxic T cells attacking infected cells
HBV histo
ground glass hepatocytes
cells with endoplasmic retuculum swollen with HSsAg
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HBV ground glass hepatocytes
most common blood bourne infection in US
HCV
HCV transmission
inoculations and blood transfusions
IV drug use - 60%
transfusions
hemodialysis and healtcare workers
natural history of HCV
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HDV features
unique RNA virus that is replication defective
only causes infection when encapsulated by HBsAg
Dependent on HBV for multiplication
HEV features
enterically transmitted, water bourne
mostly self limiting, except in high mortality in pregnant women
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sinusodal lymphocytes and kupffer cells top
apoptotic hepatocyte bottom
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acute hepatitis
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normal liver
clinically chronic hepatitis
presistent inflammatory reaction of the liver with more than 6 months of linical signs and symptoms
maked patchy expansion of the portal tracts by predominantly lymphocytes, interface hepatitis, varying degrees of bile duct damage, steatosis, lobular inflammation
grade and stage for chronic hepatitis C
grade - activity
stage - fibrosis
what is harvoni
treatment of genotype 1 of hepatitis C
one pill, once a day
in clinical studies 96-99% of patients who had no prior treatment were cured in 12 weeks of therapy
combo of sofosbuvir, ledipasvir
what are sofosbuvir and ledipasvir
sofosbuvir - nucleotide polymerase inhibitor
ledipasvir - NS5A inhibitor
what are factors that are taken into account in activity (grade) of chronic hepatitis C
portal inflammation
interface hepatitis
confluent necrosis
apoptosis
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portal inflammation
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interface hepatitis
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confluent necrosis
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apoptosis and lobular inflammation
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apoptotic hepatocyte
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fibrosis
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fibrosis
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a finding in cirrhosis
seen when fibrosis crosses from one structure to another
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fibrosis
describe autoimmune hepatitis
young and middle aged women
ANA or anti SMA usually present
chronic disease, progressive and fatal without treatment
treatment of autoimmune hepatitis
steroid therapy leads to symptomatic improvment but doesnt prevent progression
diagnostic criteria for autoimmune hepatitis
female
polyclonal hypergammagolbulinemia
circulating autoAb (ANA, ASMA)
absence of viral infection, drugs, EtOH
favorable response to immunosuppression
hepatic rather than cholestatic liver enzyme profile
autoimmune hepatitis features during flare
marked interface hepatitis, lymphoplasmacytic infiltrate, hepatocyte rosettes, emperipolesis
lobular activity
autoimmune hepatitis features during quiescent phase
no lobular activity/no to minimal interface activity
mild portal inflammation
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interfacing inflammation
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plasma cells
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Interface inflammation
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interface inflammation
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plasma cells
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hepatocyte rosettes
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emperipolesis
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resolved inflammation
describe alcohol induced liver disease
steatoiss, production of excess reducing equivalents (NADH + H+) due to metabolism of alcohol
describe hepatic steatosis
small and large fat droplets
initially centrilobular; progresses to entire lobule
fatty change is reversible with abstinence
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steatosis
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steatosis
describe histo of alcoholic hepatitis
hepatocyte swelling and necrosis (ballooning)
mallory hyaline (ubiquinated cytokeratin intermediate filaments)
neutrophilic reaction
fibrosis
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ballooned hepatocyte
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mallory hyaline in ballooned hepatocyte
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chicken wire fibrosis
causes of NAFLD
obesity
dyslipidemia, hyperinsulinemia, insulin resistance
what is macrovesicular / large droplet fat defined as
fat droplets occupying greater than 1/2 of hepatocyte
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what is a small droplet defined as
a fat droplet occupying <1/2 of hepatocyte
not as bad as large droplet
what is true microcesicular steatosis
very small uniform fat globules packed within hepatocytes visible at least as patches at 10x in fatty liver of pregnancy
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microvesicular steatosis
causes of microvesicular steatosis
acute fatty liver of pregnancy
drugs
toxins
TPN
reye syndrome
infection
what is reye syndrome
acute post viral illness in children who are given aspirin for fever
microvesicular steatosis
encephalopathy due to widespread mitochondrial injury
what is fulminant hepatitis
hepatic insufficiency progresses from onset of sx to hepatic encephalopathy in 2-3 weeks
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centrilobular necrosis in acetaminophen OD
describe acetaminophen OD effect on hepatocytes
centrilobular hepatocytes (zone 3) contain more microsomal biotransformation enzymes than the peripheral zone (1) hepatocytes
where are most HCC found
asia
etiology of HCC
viral infection
alcohol
food contaminants
hemochromatosis
what are aflatoxins
found in regions where HBV is endemic
from aspergillus flavus
carcinogenic toxins in moldy grains and peanuts
toxins cause mutations in tumor suppressor genes (p53)
carcinogenesis only occurs in mitotically active liver
describe characterisics of HCC
unifocal, multifocal, diffuse
green tinge
invade vascular channels, intrahepatic mets
well differentiated anaplastic
trabecular, acinar, solid, scirrhous
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HCC
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Endothelial cells wrapped around expanded hepatic plates
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expanded trabeculae HCC
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HCC
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HCC
features of fibrolamellar HCC
young women 20-40
no risk factors
no cirrhosis
better prognosis potentially
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fibrolamellular HCC
Thick hyalinized fibrous bands
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HSV hepatitis
Note - purple ring on outside of cell is chromatin - margination