Liver and Friends Flashcards
What are the stages of alcoholic liver disease
- Alcoholic fatty liver - hepatic steatosis
- Alcoholic hepatitis
- Cirrhosis
Which process of alcoholic liver disease is irreversible
Cirrhosis - functional liver tissue is replaced with scar tissue
What is the alcoholic drinking recommendations
No more than 14 units per week
Across 3 days or more
No more than 5 units per day
What questions (2) can be used to screen for harmful alcohol use
CAGE questions
AUDIT questionnaire
Describe CAGE questions
Cut down?
Annoyed - commenting about drinking
Guilty
Eye opener - drink first thing in a morning
Name 3 risk factors for alcoholic liver disease
Prolonged and heavy alcohol consumption
Hepatitis C
Female sex
Name the clinical features of alcoholic liver disease
Ascites
Weight loss/gain
Malnutrition and wasting
Anorexia
Fatigue
Abdominal pain
Hepatomegaly
Name the investigations for alcoholic liver disease
GS- liver biopsy
Blood tests
Liver ultrasound
Transient elastography
Endoscopy
CT and MRI scans
What is the management of alcoholic liver disease
Stop drinking - alcohol withdrawal
Nutritional support - vitamins and high-protein diet
Treat complications of liver cirrhosis
Liver transplant
Define non-alcoholic liver disease
Characterised by excessive fat in the liver cells (specifically triglycerides)
Describe the pathophysiology of non-alcoholic fatty liver disease
Excessive fat interferes with normally functioning liver cells.
Can progress into hepatitis and cirrhosis
What are the stages of non-alcoholic fatty liver disease
- Non-alcoholic fatty liver disease.
- Non-alcoholic steatohepatitis
- Fibrosis
- Cirrhosis
What are the risk factors for non-alcoholic fatty liver disease the same as
CVD
What is non-alcoholic fatty liver disease associated with
Metabolic syndrome = hypertension + obesity + diabetes
Describe the clinical features of non-alcoholic fatty liver disease
Early - asymptomatic
Late -
Nausea
Vomiting
Jaundice
Pruritis
Ascites
Memory impairment
Easy bleeding
Loss of appetite
Name 2 signs of non-alcoholic fatty liver disease
Jaundice
Spider angiograms
What are the investigations of non-alcoholic fatty liver disease
Raised alanine aminotransferase (ALT)
Liver ultrasound
Enhanced liver fibrosis blood test
Transient elastography
Liver biopsy
What tests can be used to score non-alcoholic fatty liver disease
NAFLD fibrosis score
Fibrosis 4
Both assess for liver fibrosis
What is the gold standard test for non-alcoholic fatty liver disease
Liver biopsy
What is the management for non-alcoholic fatty liver disease
Modifications
- Weight loss
- Healthy diet
- Avoid/limit alcohol intake
- stop smoking
- Control diabetes.
Refer patients for scoring
Specialist management
Which hepatitis are RNA viruses
A, D, E
Which hepatitis are DNA viruses
B, C
Which hepatitis route of transmission is Faeco-oral
A, E
Which hepatitis are blood/sexual transmission
B, C, D
What are the clinical features of hepatitis A infection
Cholestasis with:
- Pruritus
- Significant jaundice
- Dark urine
- Pale stools
Which hepatitis are a chronic infection
B, C, D
Describe the diagnosis of hepatitis A
IgM antibodies to hepatitis A
Describe the management of hepatitis A
Supportive - usually resolves without treatment
Describe the screening test for hepatitis B
Measure IgM and IgG versions of HBcAb
IgM - active infection
- high = acute
- low = chronic
IgG = past infection
HBsAg = active infection in acute phase (replicating)
Describe the management of hepatitis B
Supportive + antiviral (tenofovir, analogues)
Describe the serology of hepatitis C
HVC Ab = all patients
HCV RNA = chronic infection
Describe the investigations of hepatitis C
Hepatitis C antibody = screening test
Hepatitis C RNA testing - confirms diagnosis
What is the management of hepatitis C
Direct-acting antivirals
- Pegylated interferon weekly injections
+ Ribavirin tablets
When can someone have hepatitis D
With a hepatitis B infection
Increases complications and disease severity of hepatitis B
What is the management of hepatitis D
pegylated interferon alpha
Which hepatitis currently have a vaccine
A, B
What is the prevention for hepatitis A and B
Pre and post exposure immunisation
B as well - behaviour modification
How is hepatitis C prevented
Blood donor screening
Behaviour modification
How is hepatitis D prevented
HBV immunisation
Behaviour modification
How is hepatitis E prevented
Clean drinking water
What is the treatment for hepatitis E
Supportive
Define liver cirrhosis
Due to chronic inflammation and damage to liver cells. Functional cells are replaced with scar tissue (fibrosis) - nodules of scar tissue
What are the 4 most common causes of liver cirrhosis
Alcohol-related liver disease
Non-alcoholic fatty liver disease
Hepatitis B
Hepatitis C
What are the risk factors of liver cirrhosis
Alcohol misuse
IVDU
Unprotected intercourse
Obesity
Birth country
Name a complication of liver cirrhosis
Portal hypertension
Name the clinical features of liver cirrhosis
Cachexia
Jaundice
Hepatomegaly
Small nodular liver
Splenomegaly
Spider naevi
Palmar erythema
Describe the investigations of liver cirrhosis
GS-Gastroscopy
Blood tests
- LFTs
- Albumin
- Prothrombin time
- FBC
Non-invasive liver screening
Imaging
Name 2 tests for clinical diagnosis of liver cirrhosis
MELD score - model for end-stage liver disease
Child-Pugh Score
Describe MELD Score
Score every 6 months in patients with compensated cirrhosis
Describe the Child-Pugh score for liver cirrhosis
Used 5 factors (score 1,2,3) to assess the severity of cirrhosis and the prognosis
Max score 15
ABCDE
Albumin
Bilirubin
Clotting (INR)
Dilation (ascites)
Encephalopathy
What are the 4 principles of the management of liver cirrhosis
- Treat underlying condition
- Monitor for complications
- Manage complications
- Live transplant
When is liver transplant considered in liver cirrhosis
When features of decompensated liver disease
Features
Ascites
Hepatic encephalopathy
Oesophageal varices bleeding
Yellow (jaundice).
Define jaundice
Yellow discolouration of the sclera and skin
Why does jaundice occur
Hyperbilirubinemia - occurs at > 51 micromol/L.
What is the normal range for total bilirubin
3.4-20 micromol/L
Describe the pathophysiology of jaundice
Bilirubin - conjugated within the liver = soluble.
Majority = ejested in the faeces as urobilinogen ad stercobilin
10% urobilinogen absorbed back into the blood stream and excreted by the kidneys
Jaundice occurs when this pathway is disrupted
Name the 3 types of jaundice
- Pre-hepatic
- Hepatocellular (intra-hepatic)
- Post-hepatic
Describe pre-hepatic jaundice
Excessive red cell breakdown - overwhelms the liver’s ability to make conjugated bilirubin
Causes - unconjugated hyperbilirubinemia
Unconjugated remains in the blood stream to cause the jaundice
Describe intra hepatic jaundice
Cirrhosis compresses the intra-hepatic proteins of the biliary tree to cause obstruction.
Leads to both conjugated and unconjugated bilirubin in the blood
Describe post hepatic jaundice
Obstruction of biliary drainage
Bilirubin is not excreted will have been conjugated by the liver
= conjugated hyperbilirubinemia
Name 3 causes pre-hepatic jaundice
Haemolytic anaemia
Gilbert’s syndrome
Criggler-Najiar syndrome
Describe the potential causes of intra-hepatic jaundice
Alcoholic liver disease
Viral hepatitis
Iatrogenic
Autoimmune hepatitis
Primary biliary cirrhosis
Primary sclerosing cholangitis
Hepatocellular carcinoma
Describe the potential causes of post-hepatic jaundice
Intra-luminal causes - gallstones
Mural causes
Extra-mural causes
Name the risk factors of jaundice
Drugs and alcohol
Social history
Autoimmune
Sexual history
Inflammation of the bile duct
Haemolytic anaemia
Obstruction of the bile duct
Pre-hepatic jaundice
Name
Urine
Stools
Itching
Liver tests
Normal
Normal
No
Normal
Describe intra/post-hepatic jaundice
Urine
Stools
Itching
Liver tests
Dark
May be pale
Maybe
Abnormal
Describe the investigations of jaundice
Liver enzymes
Biliary obstruction
Imaging
Describe the management of jaundice
Dependent on underlying cause
Obstructive
- removal of gallstones
- cholangiopancreatography or stenting of common bile duct
Symptomatic treatment - itching
Identify and manage any complications
Treatment of confusion
What is the treatment of confusion due to decompensating chronic liver disease
Laxatives +/- neomycin
Rifaximin
Attempts to reduce the number of ammonia-producing bacteria in the bowel
Define autoimmune hepatitis
Chronic inflammatory disease of the liver with unknown aetiology.
Characterised by the presence of circulating auto-antibodies with a high serum globulin concentration, inflammatory response changes on liver histology and favourable responses to immunosuppressive treatment.
What are the causes of autoimmune hepatitis
Occur due to combination of genetic and environmental factors
Name the different types of autoimmune hepatitis
Type 1 and 2
Describe type 1 autoimmune hepatitis
Affects women
Late 40-50s
Presents around or after menopause with fatigue and features of liver disease on examination
Less acute than type 2
Describe type 2 autoimmune hepatitis
Children or young people
More commonly girls
Acute hepatitis
Transaminases and jaundice
Name the risk factors of autoimmune hepatitis
Female sex
Genetic pre-disposition
Immune dysregulation
Name the investigations of autoimmune hepatitis
High transaminases
Minimal changes in ALP levels
Raised IgG
Liver biopsy
Describe the management of autoimmune hepatitis
Prednisolone + azathioprine (90%)
Liver transplant - autoimmune hepatitis can reoccur
Define Wernicke’s encephalopathy
Neurological emergency resulting from thiamine deficiency with varied neurocognitive manifestations
Define Korsakoff syndrome
Memory disorder that results from vitamin B1 deficency and is associated with alcoholism.
Describe the causes of Wernicke-Korsakoff syndrome
Acute or subacute deficiency of thiamine
Decreased intake - oral or parenteral
Increased demand, or malabsorption from the GI tract
Other causes:
- alcohol abuse
- dietary deficiency
- prolonged vomiting
- eating disorders
- effects of chemotherapy
Name the clinical features of Wernicke’s encephalopathy
Damage to the brain’s thalamus and hypothalamus
- Neuropsychiatric manifestations
- Confusion
- Oculomotor disturbances
- Ataxia
- Gait and balance disorders
Describe the clinical features of Korsakoff syndrome
Memory impairment - retrograde or anterograde
Behavioural changes
Describe the investigations of Wernicke-Korsakoff syndrome
Therapeutic trial of parenteral thiamine
Other tests
- Finger-prick glucose
- Bloods
Describe the management of Wernicke-Korsakoff syndrome
Treated in emergency with thiamine replacement
Wernicke’s important to start thiamine replacement before beginning nutritional replenishment
What is the prevention of Wernicke-Korsakoff syndrome
Thiamine supplementation
Alcohol abstaining
Define hepatic encephalopathy
Brain dysfunction (neuropsychiatric syndrome) caused by acute or chronic advanced hepatic insufficiency and/or portosystemic shunt
Name the 3 pathophysiological mechanisms for hepatic encephalopathy
Ammonia absorbed into circulation through the portal venous system
Hyperammonaemia - affecting neurotransmitter synthesis
Increased activation of GABA
Describe the cause of hepatic encephalopathy
Combination of metabolic encephalopathy, brain atrophy and/or brain oedema
Name 4 symptoms of hepatic encephalopathy
Mood, sleep and motor disturbances
Advanced neurological deficits
Name 7 signs of hepatic encephalopathy
Asterixis
Palmar erythema
Spider angiomata
Peripheral oedema
Jaundice
Hepatomegaly
Ascites
Name the investigations for hepatic encephalopathy
Blood
Urine culture
Urine toxin screen
Ultrasonography
Head CT or MRI
Name the primary objectives of the management of hepatic encephalopathy
Provide supportive care
Exclude other causes of altered mental state
Identify and correct precipitating factors
Reduce the nitrogenous load from the gut
Assess the need for long-term therapy
Describe the pathophysiology of pancreatic cancer
Tumour in the head of the pancreas grows large enough to compress the bile duct
Spread metastasis early
Name the risk factors for pancreatic cancer
Smoking
Family history
Name the clinical features of pancreatic cancer
Key = painless obstructive jaundice
- yellow skin and sclera
- pale stools
- dark urine
- generalised itching
Other vague presenting features
Name the clinical signs of pancreatic cancer
Courvoisier’s law
Trousseau’s sign of malignancy
Describe Courvoisier’s Law
Palpable gallbladder + jaundice = unlikely to be gallstones.
Usual cause - cholangiocarcinoma or pancreatic cancer
Describe Trousseau’s sign of malignancy
Migratory thrombophlebitis = sign of malignancy
Blood vessels become inflamed with associated thrombus in multiple different locations over time.
Describe the investigations of pancreatic cancer
Imaging
CA19-9 (carbohydrate antigen) = tumour marker.
Biopsy
How is a diagnosis of pancreatic cancer made.
Imaging (usually CT scan) + histology from biopsy
What are the NICE referral guidelines for pancreatic cancer
> 40 + jaundice = 2 week wait
> 60 + weight loss + one additional symptom = referred for a direct access CT abdomen
Describe the management of pancreatic cancer
Options
Surgery
Palliative treatment (if no surgery).
Define hepatocellular carcinoma
Main type of primary liver cancer = originates in the liver
Name the risk factors for hepatocellular carcinoma
Liver cirrhosis = main
Diabetes
Obesity
Family history
Describe the clinical features of hepatocellular carcinoma
Asymptomatic originally
Present late = poor prognosis
Non-specific features
- weight loss
- abdominal pain
- anorexia
- nausea and vomiting
- jaundice
- pruritus
- upper abdominal mass on palpitation
Describe the investigations for hepatocellular carcinoma
Alpha-fetoprotein
Liver ultrasound
CT/MRI scans
Biopsy
Describe the screening for hepatocellular carcinoma
Patients with cirrhosis screened every 6 months
Ultrasound
Alpha-fetoprotein
Describe the management of hepatocellular carcinoma
Surgery
Radiofrequency ablation
TACE
Radiotherapy
Targeted drugs
Describe cholangiocarcinoma
Cancer that originates in the bile duct
Majority = adenocarcinomas
Common site = perihilar region
What are the key risk factors of cholangiocarcinoma
Primary sclerosing cholangitis
Liver flukes (a parasitic infection)
What are the clinical features of cholangiocarcinoma
Key - obstructive jaundice
- Pale stools
- Dark urine
- Generalised itching
Non-specific symptoms
Courvoisier’s Law
Describe the investigations of cholangiocarcinoma
Imaging
CA19-9 tumour marker
What is the management of cholangiocarcinoma
Curative surgery
Palliative treatment
Name 6 types of hernias
- Inguinal
- Femoral
- Umbilical
- Incisional
- Epigastric
- Hiatal
Define the pathophysiology of a hernia
Occurs when there is a weak point in a cavity wall, usually affecting the muscle or fascia.
Weakness allows a body organ that would normally be contained within that cavity to pass through the cavity wall.
Describe an inguinal hernia
Soft lump in the inguinal region (in the groin)
What are the 2 types of inguinal hernia
- Indirect inguinal hernia
- bowel herniates through the inguinal canal - Direct inguinal hernia
- Weakness in the abdominal wall at the Hesselbach’s triangle
Define a femoral hernia
Involves herniation of the abdominal contents through the femoral canal
Describe the pathophysiology of a femoral hernia
Occurs below the inguinal ligament
Opening between the peritoneal cavity and the femoral canal = femoral ring
Femoral ring leaves only a narrow opening for femoral hernias
What risks are femoral hernias associated with
Incarceration
Obstruction
Strangulation
Describe umbilical hernias
Occur around the umbilicus due to a defect in the muscle around the umbilicus
Describe an incisional hernia
Occur at the site of an incision from a previous surgery
Describe the pathophysiology of an incisional hernia
Due to weakness where the muscle and tissues where closed after a surgical incision
Bigger incision = higher risk
Difficult to repair = high recurrence rate
Define an epigastric hernia
Hernias in the epigastric area (upper abdomen)
Describe a hiatal hernia
Herniation of the stomach up through the diaphragm
Describe the pathophysiology of an hiatal hernia
Diaphragm opening should be at the level of the lower oesophageal sphincter and should be fixed in place.
Narrow opening helps to maintain the sphincter and stop acid and stomach contents refluxing.
When opening is wider - stomach can enter through the diaphragm and contents can reflux
Name the types of hiatal hernia
1 - Sliding - stomach slides up through the diaphragm
2 - Rolling - separate portion of the stomach folds around the entry of the diaphragm alongside the oesophagus
3 - Combination of sliding and rolling.
4 - Large opening with additional organs entering the thorax
Name the risk factors of inguinal hernias
Male sex
Older age
Family history
Prematurity
AAA
Name the risk factors of femoral hernias
Women
Increased age
Low BMI
Name the risk factors for hiatus hernias
Increasing age
Obesity
Pregnancy
Name the risk factors of umbilical hernias
Women
Down’s syndrome
Beckwith-Wiedemann syndrome
Raised intra-abdominal pressure