Medicine Marrow Pg No 995-1004 (Hepatology)
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Questions and Answers

Which of the following is NOT a cause of chronic hepatitis and cirrhosis?

  • NASH
  • Diabetes (correct)
  • Wilson's disease
  • Alcohol
  • Children experiencing cholestasis are at risk for cirrhosis.

    True

    What is the life expectancy without a transplant for a patient in the decompensation stage of cirrhosis?

    2 years

    One of the symptoms associated with cirrhosis is _____ muscle wasting.

    <p>increased</p> Signup and view all the answers

    Match the stage of liver disease with its primary feature:

    <p>Chronic Hepatitis = May present with hepatomegaly Cirrhosis = Shrinkage of liver seen Portal HTN = Hepatocellular carcinoma Decompensation = Life expectancy 2 years without transplant</p> Signup and view all the answers

    What is the main factor that determines variceal wall tension?

    <p>Pressure</p> Signup and view all the answers

    Small varices (≤ 5 mm) have a bleeding risk of more than 10% per year.

    <p>False</p> Signup and view all the answers

    What is the initial IV dosage of Terlipressin for acute variceal bleeding?

    <p>2 mg Q6h x 48 hours</p> Signup and view all the answers

    Mortality from variceal bleeding ranges from _____ to _____ percent.

    <p>15, 30</p> Signup and view all the answers

    Match the following risk categories with their corresponding bleeding risk rates:

    <p>Small varices = &lt; 10%/year Large varices = 30%/year Without varices = 8%/year Variceal hemorrhage = 5-15%/year</p> Signup and view all the answers

    Which of the following is NOT an indicator of a poor prognosis in acute liver failure?

    <p>Heart rate &gt; 100 bpm</p> Signup and view all the answers

    A prothrombin time greater than 100 seconds indicates a good prognosis in acute liver failure.

    <p>False</p> Signup and view all the answers

    What arterial pH level indicates a poor prognosis if it remains low for more than 24 hours after drug ingestion?

    <p>&lt; 7.35</p> Signup and view all the answers

    A serum creatinine level greater than ______ indicates poor prognosis in acute liver failure.

    <p>3.4 mg/dL</p> Signup and view all the answers

    Match the following indicators with their corresponding measurement:

    <p>Prothrombin time = INR &gt; 6.5 Serum creatinine = &gt; 3.4 mg/dL Arterial pH = &lt; 7.35 after 24 hours Encephalopathy grading = Grade 3 to 4</p> Signup and view all the answers

    What is the threshold pressure for variceal rupture in HVPG?

    <p>≥ 12 mm Hg</p> Signup and view all the answers

    Nodular compression of sinusoids is a mechanical cause of sinusoidal vasoconstriction.

    <p>True</p> Signup and view all the answers

    What is a common cause of pre-hepatic portal hypertension seen in young children?

    <p>Extrahepatic portal venous obstruction (EHPVO)</p> Signup and view all the answers

    The condition that is associated with hepatic vein obstruction is known as _____ Syndrome.

    <p>Budd Chiari</p> Signup and view all the answers

    Match the following types of portal hypertension with their causes:

    <p>Pre-hepatic = Extrahepatic portal venous obstruction (EHPVO) Pre-sinusoidal = Non-cirrhotic portal fibrosis (NCPF) Post-hepatic = Budd Chiari Syndrome Post-sinusoidal = Sinusoidal obstruction syndrome</p> Signup and view all the answers

    What is the primary indication for endoscopic variceal ligation?

    <p>Intolerant to β-blocker therapy</p> Signup and view all the answers

    An HVPG greater than 10 mm Hg is considered normal.

    <p>False</p> Signup and view all the answers

    What condition is confirmed by a Fibroscan reading of 13.5 kPa?

    <p>Cirrhosis</p> Signup and view all the answers

    The Hepatic Venous Pressure Gradient (HVPG) is calculated by subtracting _____ from _____ .

    <p>FHVP, WHVP</p> Signup and view all the answers

    Match the following Child-Pugh classification classes with their requirements:

    <p>Class A = No immediate transplant requirement Class B = Requires transplant Class C = Severe liver dysfunction needing urgent care</p> Signup and view all the answers

    Which of the following is a complication of portal hypertension?

    <p>Hepatic encephalopathy</p> Signup and view all the answers

    Portal hypertension can only occur in patients with cirrhosis.

    <p>False</p> Signup and view all the answers

    What is considered clinically significant portal venous pressure in mm Hg?

    <p>12</p> Signup and view all the answers

    The disappearance of fenestration in cirrhosis is caused by the presence of __________ and fibrous septa compressing the sinusoids.

    <p>nodules</p> Signup and view all the answers

    Match the following features of the portal vein with their characteristics:

    <p>High compliance = Resistant to changes in pressure Low resistance = Easily accommodates blood flow Length of 7.5 cm = Length measurement of the portal vein Hepatic buffer response = Rare hepatic ischemia due to dual blood supply</p> Signup and view all the answers

    What is a major mechanical cause of increased sinusoidal pressure in cirrhosis?

    <p>Compression by nodules</p> Signup and view all the answers

    Splenomegaly is a common feature in portal hypertension due to cirrhosis.

    <p>True</p> Signup and view all the answers

    Name the two neurohormonal systems stimulated as a response to decreased effective circulatory volume in cirrhosis.

    <p>RAAS and ADH</p> Signup and view all the answers

    In cirrhosis, increased peripheral ________________ leads to a hyperdynamic circulation state.

    <p>vascular resistance</p> Signup and view all the answers

    Match the following features of liver failure with their associated conditions:

    <p>Palmar erythema = Hypersplenism Hyperpigmentation = Alopecia Dupuytren's contracture = Parotid swelling Thrombocytopenia = Alcohol consumption</p> Signup and view all the answers

    What is the primary treatment for hemochromatosis?

    <p>Early phlebotomy</p> Signup and view all the answers

    NASH has a poor outcome if not treated promptly.

    <p>True</p> Signup and view all the answers

    What disease requires early penicillamine treatment?

    <p>Wilson's disease</p> Signup and view all the answers

    In cirrhosis, the normal lobular architecture of the liver is replaced by __________.

    <p>nodules</p> Signup and view all the answers

    Match the stages of hepatic fibrosis with their description:

    <p>Stage 1 = Mild periportal fibrosis Stage 2 = 1+ Septation Stage 3 = 2+ Bridging fibrosis Stage 4 = 3+ Nodules; Full blown cirrhosis</p> Signup and view all the answers

    Which of the following is NOT included in routine screening?

    <p>Cholecystitis</p> Signup and view all the answers

    The outcome for NASH is generally poor regardless of treatment.

    <p>False</p> Signup and view all the answers

    What stage of fibrosis involves bridging fibrosis extending to the next portal tract?

    <p>Stage 3</p> Signup and view all the answers

    Which of the following drugs is a common cause of drug-induced liver injury when taken in excess?

    <p>Paracetamol</p> Signup and view all the answers

    Mushroom toxicity is considered a dose-independent cause of acute liver failure.

    <p>False</p> Signup and view all the answers

    What enzyme activity is defective in the pathophysiology of paracetamol toxicity?

    <p>CYP2E1</p> Signup and view all the answers

    The maximum safe daily dose of paracetamol is _____ grams.

    <p>4</p> Signup and view all the answers

    Match the clinical features of paracetamol toxicity with their corresponding descriptions:

    <p>Hepatic encephalopathy = Increased intracranial pressure and seizures Coagulopathy = Increased risk of bleeding due to elevated INR Acute tubular necrosis = Renal failure and metabolic disturbances Multiple organ dysfunction syndrome = Severe failure of multiple organ systems</p> Signup and view all the answers

    What is a consequence of decreased sex hormone binding globulins in females?

    <p>Hypoestrogenism</p> Signup and view all the answers

    Caput medusae refers to the flow of blood toward the umbilicus.

    <p>False</p> Signup and view all the answers

    What condition can lead to encephalopathy and variceal bleeding?

    <p>Decompensated cirrhosis</p> Signup and view all the answers

    Dihydrotestosterone is associated with increased risk of ________ and testicular atrophy.

    <p>gynecomastia</p> Signup and view all the answers

    Match the following consequences of liver failure with their descriptions:

    <p>Jaundice = Sign of liver failure Testicular atrophy = Decrease in testicular volume due to hormonal changes Ascites = Fluid accumulation in the abdominal cavity Encephalopathy = Neurological decline due to liver dysfunction</p> Signup and view all the answers

    Study Notes

    Variceal Bleeds

    • Main factor: Variceal wall tension
    • Variceal wall tension is determined by: Vessel diameter and pressure.
    • Gastroesophageal varices are the cause of 50% of cirrhosis
    • Without varices, the rate of development is 8% per year
    • Variceal hemorrhage occurs at a rate of 5-15% per year
    • Risk of bleeding:
      • Small varices (≤ 5 mm): < 10%/year
      • Large varices: 30%/year
    • Mortality from variceal bleeding: 15-30%
    • Acute variceal bleeding:
      • Bleeding:
        • Terlipressin (IV):
          • 2 mg Q6h x 48 hours (initial dose)→
          • Stat dose → 50 µg/hour
        • IV Octreotide 50 µg stat → 50 µg/hour
        • ** antibiotics**
        • Replace blood volume
        • Intubation to be considered
      • Upon failure:
        • Endoscopy: Variceal ligation or Sclerotherapy
      • Upon failure:
        • TIPSS (Transjugular Intrahepatic Portosystemic Shunt)

    Chronic Hepatitis - Cirrhosis

    • Causes:
      • NASH (Non-Alcoholic steatohepatitis)
      • Alcohol
      • HBV/HCV
      • Autoimmune disease
      • Wilson's disease
      • Hemochromatosis
      • Budd Chiari Syndrome
      • Biliary cirrhosis
    • In children:
      • Cholestasis
      • α-1 Antitrypsin deficiency
      • Indian childhood cirrhosis

    Disease Progression

    • Stage | Features
    • Chronic Hepatitis | Usually asymptomatic. Can be screened for with LFTs. May present with hepatomegaly.
    • Cirrhosis | Shrinkage of the liver seen
    • Portal HTN | Hepatocellular carcinoma
    • Decompensation | Life expectancy 2 years without transplant. Liver failure.

    Features

    • Fatigue
    • Altered sleep rhythm
    • Muscle wasting
    • Loss of libido
    • Hepatomegaly (if seen)

    Management

    • Laboratory Investigation:
      • ALT/AST ↑ ( AST > ALT in alcoholic hepatitis)
      • Continuous monitoring of liver enzymes
    • Fibroscan: Quantitative test to ascertain degree of fibrosis.

    Acetaminophen Cases

    • King's College Hospital Indicators of a Poor Prognosis in Acute Liver Failure:
      • Arterial pH < 7.35 more than 24 hours after drug ingestion
      • All of the following:
        • Prothrombin time > 100 sec or INR > 6.5
        • Serum creatinine level > 3.4 mg/dL (300 mmol/L) or anuria
        • Grade 3 to 4 encephalopathy

    Management of Portal Hypertension

    • Patient with risk factors for chronic hepatitis:
      • Deranged LFT + USG: fatty liver + Negative serology (AST / ALT < 150)
      • Confirms chronic hepatitis (NASH)
      • Fibroscan: 13.5 kPa
      • Cirrhosis
      • Splenomegaly (+), ↓ Platelet
      • Portal Hypertension (+)
    • HVPG (Hepatic Venous Pressure Gradient): WHVP - FHVP
      • Prehepatic | Normal | Normal | Normal
      • Presinusoidal | Normal | Normal | Normal
      • Sinusoidal | Increased | Normal | Increased
      • Postsinusoidal | Increased | Normal | Increased
    • >10 mm Hg
    • Endoscopy:
      • Large varices → Mild/moderate varices → Conservative management
      • Indications for endoscopic variceal ligation:
        • Intolerant to β-blocker therapy:
          • Asthma
          • COPD
        • β-blockers contraindicated:
          • Severe bradycardia
        • Target HVPG not achieved with β-blocker

    Modified Child-Pugh Scoring System

    • Parameters Assessed:
      • Ascites
      • Encephalopathy
      • Bilirubin
      • Albumin
      • Prothrombin time (seconds increased)
    • Classes:
      • A
      • B → Requires Transplant
      • C

    Sinusoidal Vasoconstriction in Portal HTN

    • Resistance due to: P=FXR:R↑=P↑P = FXR: R↑ = P↑P=FXR:R↑=P↑
    • Mechanical cause:
      • Nodule compressing sinusoid
    • Functional cause:
      • ↓ intrasinusoidal NO
      • Contraction of sinusoid
      • Defenestration
    • HVPG (Hepatic Venous Pressure Gradient)
      • HVPG | Description
      • 1-5 mm Hg | Normal value
      • ≥ 10 mmHg | Clinically significant portal hypertension
      • ≥ 12 mm Hg | Threshold pressure for variceal rupture
      • ≥ 20 mm Hg | ↑ Risk of death

    Causes

    • Pre-hepatic: First order portal vein occlusion AKA Extrahepatic portal venous obstruction (EHPVO)
      • Seen in 3-8 year olds
      • Severe upper gastrointestinal bleed
      • Massive splenomegaly
      • No cirrhosis (good prognosis)
      • Cause:
        • Umbilical sepsis
        • Splenic vein thrombosis (rare)
    • Pre-sinusoidal: (3rd order portal vein)
      • a.NCPF (Non-cirrhotic portal fibrosis)/ Idiopathic portal hypertension
        • Presentation: Young adults with upper GI bleed, splenomegaly
        • Cirrhosis (rare)
      • b.Other causes
        • Schistosomiasis
        • Sarcoidosis
    • Post-hepatic:
      • a.Cause: Hepatic vein obstruction AKA Budd Chiari Syndrome
        • Classical findings: Ascites, hepatomegaly
      • b.Other causes
        • Right heart failure
          • Tricuspid regurgitation
          • Restrictive cardiomyopathy
          • Constrictive pericarditis (↑ JVP)
    • Post-sinusoidal: Intrahepatic
      • Sinusoidal:
        • Cause: Sinusoidal obstruction syndrome/ veno occlusive disease
        • A/W Post-hematopoietic stem cell transplant following myeloablative therapy with alkylating agents (10-30 days after)

    Complications of Cirrhosis

    PORTAL HTN

    • Pathology:
      • A. ↑ Sinusoidal Pressure
        • Mechanical Cause:
          • Compression by Nodules
        • Functional Cause:
          • ↓ Intrasinusoidal NO
          • Sinusoidal Vasoconstriction and Defenestration
      • ↑ Resistance (Sinusoidal pressure & Recritance)
      • B.Gut endotoxemia
      • C.↑ Systemic NO: Widespread splanchnic vasodilation
        • Profound loss in Peripheral vascular resistance
        • Hyperdynamic circulation (↑F)
    • ↓ Effective circulatory volume
      • Stimulation
        • RAAS
        • ADH
        • ↑ Intravascular volume
      • Features: ↑ splenic vein pressure
    • Features:
      • Splenomegaly (Hypersplenism)
      • Thrombocytopenia (Trapping of PLT's)

    LIVER FAILURE

    • Features:
      • Hyperdynamic circulation:
        • Palmar erythema
        • Hyperpigmentation
    • A/W Alcohol Consumption:
      • Alopecia
      • Parotid Swelling
      • Dupuytren's contracture
    • ↑ Pressure
      • Portal
      • HTN

    Portal Hypertension

    • Portal hypertension can manifest with or without cirrhosis.
    • Portal Hypertension leads to:
      • Hepatic encephalopathy
      • Variceal Bleeding
      • Ascites - 1st sign of decompensation
      • Hepatorenal syndrome

    Clinical Anatomy and Pathogenesis

    • PATHOGENESIS
      • Portal venous pressure ≥ 12 mm Hg
      • Sinusoidal pressure ≥ 6 mm Hg (Clinically significant if ≥ 10 mm Hg) ↑ in pressure ↑ Portal venous pressure = complication
    • Mechanism of Hypertension
      • Cirrhosis: Loss of fenestration, compression by nodules & septae
      • Increased Splenic Pressure: Leads to splenomegaly (earliest clinical), Thrombocytopenia (earliest biochemical)

    Hepatic Vasculature

    • Development of Portal Vein
      • Inferior segment of left and right vitelline veins join/to form portal vein.
      • Splenic vein and superior mesenteric veins join behind the neck of pancreas.
    • Portal Vein Features
      • 7.5 cm long
      • Hilum posterior to hepatic and bile duct
      • Portal vein has high compliance, low resistance.
      • Hepatic buffer response - Hepatic ischemia is rare d/t dual blood supply (Portal v.& Hepatic A.)

    Clinical Features and Complications

    • Jaundice + Liver failure - Decompensation: Average survival 2 years without transplant. Mean survival without decompensation/transplant: 12 years
    • Disappearance of fenestration in cirrhosis (Nodule and fibrous septa compress the sinusoids).

    Hepatology Notes

    • Routine Screening:
      • NASH
      • HBV/HCV
      • Wilson's disease
      • Hemochromatosis
      • Autoimmune hepatitis
    • Treatment:
      • Outcome is very good if treated before/during progression.
        • Hemochromatosis: Early phlebotomy
        • Wilson's disease: Early penicillamine
        • NASH: Good outcome
        • Weight loss: (implied treatment method or consequence)

    Cirrhosis

    • Description: Normal lobular architecture of the liver is lost and replaced by nodules connected by fibrous septa.
    • Microscopic Images:
      • Image A (Normal liver): Shows a normal liver structure.
      • Image B (Normal liver microscopy): Shows microscopic details of a normal liver.
      • Image C (Cirrhotic liver): Shows a cirrhotic liver, characterized by the loss of normal liver structure, with tan-brown color, irregular surface and nodular texture and disorganized architecture with regenerative nodules surrounded by fibrous septa.

    Staging of Hepatic Fibrosis

    • Stage | Description
    • 1 | Mild periportal fibrosis
    • 2 | 1+ Septation
    • 3 | 2+ Bridging fibrosis; Fibrosis extending to the next portal tract
    • 4 | 3+ Nodules; Full blown cirrhosis

    Acute Hepatitis & Acute Liver Failure

    • Alcohol (1 mortality)
      • DILI (Drug-induced liver injury):
        • Paracetamol (most common in Europe)
        • Rifampicin (idiosyncratic)

    Drugs Causing Acute Liver Failure (ALF)

    • Dose-Dependent:
      • Paracetamol (max dose: 4g/day, toxic dose > 7.5g/day)
      • Mushroom
    • Dose-Independent (Idiosyncratic):
      • Rifampicin (single dose)
      • Carbamazepine
      • Propylthiouracil (PTU)
      • Nitrofurantoin
      • Phenytoin
      • INH
      • Valproate

    Other Causes

    • Wilson's disease
    • Acute fatty liver of pregnancy (AFLP)
    • Autoimmune hepatitis
    • Budd-Chiari syndrome
    • Rat poison

    Clinical Features

    • Hepatic encephalopathy: due to increased intracranial pressure (ICP) and cerebral edema, leading to seizures.
    • Coagulopathy: INR > 1.5, increasing risk of bleeding

    Paracetamol Toxicity

    • Pathophysiology:
      • Defective CYP2E1 enzyme activity in zone 3 of the liver.
      • Paracetamol is not metabolized properly, causing depletion of glutathione stores and leading to the accumulation of NAPQI, a hepatotoxic metabolite.

    Clinical Features (Paracetamol Toxicity):

    • Stage | Features
    • I (4.5 mg/dL, acute tubular necrosis (ATN) - sepsis & renal failure, hypoglycemia, hyponatremia, metabolic encephalopathy, lactic acidosis, multiple organ dysfunction syndrome (MODS).(Determines survival)
    • IV (>96hrs) | MODS

    Recovery phase

    Hepatology

    • No 5-α Reductase: NO DHT
      • Dihydrotestosteron
      • Gynecomastia
      • Testicular atrophy
    • Consequences:
      • Decrease sex hormone binding globulins in females → Hypoestrogenism
      • Caput medusae (flow away from umbilicus)
      • Jaundice (Sign of liver failure → Decompensation)

    Decompensation

    • Full developed Portal HTN with Ascites → Encephalopathy → Variceal bleed → Decompensated cirrhosis

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    Description

    This quiz covers the critical aspects of variceal bleeds, including their causes, risks, and management strategies. Focus areas include the factors affecting variceal wall tension, the rates of hemorrhage based on variceal size, and treatment options such as medication and endoscopic procedures.

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