Cirrhosis and Its Complications

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Cirrhosis Intro - The Scarred Liver

  • Definition: An irreversible end-stage of chronic liver disease, with diffuse fibrosis, distorted architecture, and abnormal regenerative nodules.
  • Etiology (India Focus):
    • Alcohol (leading cause in India)
    • Viral Hepatitis (Chronic Hep B, Hep C)
    • Non-Alcoholic Fatty Liver Disease (NAFLD/NASH)
    • 📌 VHANDS Mnemonic: Viral, Hemochromatosis/Wilson's, Alpha-1 antitrypsin, NASH/NAFLD, Drugs, Sclerosing cholangitis.
  • Pathogenesis:
    • Persistent liver injury activates Hepatic Stellate Cells (Ito cells).
    • Activated stellate cells transform into myofibroblasts.
    • Myofibroblasts deposit excessive collagen (Type I & III), leading to fibrosis.
    • Key cytokine: TGF-β.

Liver Cirrhosis Histopathology: Fibrosis and Nodules

⭐ Hepatic stellate cells (Ito cells) are the primary collagen-producing cells in liver fibrosis.

Cirrhosis Features - Signs & Stages

  • Morphology:
    • Micronodular: Nodules <3mm (e.g., alcohol, hemochromatosis, Wilson's disease)
    • Macronodular: Nodules >3mm (e.g., viral hepatitis, α1-antitrypsin deficiency)
  • Gross & Microscopic:
    • Gross: Shrunken, firm, finely or coarsely nodular liver.
    • Micro: Bridging fibrous septa, parenchymal regenerative nodules, disruption of architecture.
  • Clinical Features:
    • Compensated: Asymptomatic or non-specific symptoms (fatigue, weight loss).
    • Decompensated: Jaundice, ascites, variceal hemorrhage, hepatic encephalopathy.
  • Stigmata of Chronic Liver Disease: Spider nevi, palmar erythema, gynecomastia, testicular atrophy, caput medusae, clubbing, Dupuytren's contracture. Gross appearance of cirrhotic liver
  • Scoring Systems:
    • Child-Pugh Score: Assesses prognosis. 📌 Mnemonic: ABEAP (Albumin, Bilirubin, Encephalopathy, Ascites, PT/INR).
      • Class A: 5-6 points (1-year survival ~100%)
      • Class B: 7-9 points (1-year survival ~80%)
      • Class C: 10-15 points (1-year survival ~45%)
    • MELD Score: Prioritizes for liver transplant. Parameters: Serum Bilirubin, INR, Serum Creatinine.

⭐ MELD score is preferred for predicting 3-month mortality and for prioritizing patients for liver transplantation (especially >15).

Portal Hypertension - Pressure Overload

  • Definition: Hepatic Venous Pressure Gradient (HVPG) >5 mmHg; clinically significant if HVPG >10 mmHg.
    • $HVPG = \text{Portal Vein Pressure} - \text{Inferior Vena Cava Pressure}$
  • Pathophysiology: Dual mechanism:
    • ↑ Intrahepatic resistance (due to fibrosis & regenerative nodules).
    • ↑ Splanchnic blood flow (due to splanchnic vasodilation).
  • Consequences:
    • Esophageal/Gastric Varices (risk of bleeding if HVPG >12 mmHg)
    • Splenomegaly (thrombocytopenia, leukopenia)
    • Ascites
    • Caput Medusae
    • Hemorrhoids
    • Porto-systemic Encephalopathy (PSE)
  • 📌 Mnemonic (Portosystemic Shunts): GUES (Gastro-esophageal, Umbilical, Rectal, Spleno-renal)

⭐ Bleeding from esophageal varices is a life-threatening complication of portal hypertension, occurring when HVPG exceeds 12 mmHg.

Major Complications - Systemic Fallout

  • Ascites:

    • Pathophys: PHT → splanchnic vasodilation → ↓ effective arterial volume → RAAS activation → Na⁺/H₂O retention.
    • Dx: Paracentesis; SAAG ≥1.1 g/dL (indicates PHT).
  • Spontaneous Bacterial Peritonitis (SBP):

    • Dx: Ascitic fluid PMN >250 cells/mm³.
    • Common bugs: E. coli, Klebsiella.

    ⭐ Suspect SBP in cirrhotics with ascites & clinical worsening; Dx: ascitic PMN >250/mm³.

  • Hepatic Encephalopathy (HE):

    • Pathophys: ↑ NH₃, altered GABA transmission.
    • Precipitants: Infection, GI bleed, constipation, electrolyte imbalance, sedatives/opiates.
    • Grading: West Haven Criteria.
  • Hepatorenal Syndrome (HRS):

    • Pathophys: Severe renal vasoconstriction due to intense splanchnic vasodilation & ↓ effective circulating volume.
    • Types: Type 1 (rapid, poor prognosis), Type 2 (slower, with refractory ascites).
  • Hepatocellular Carcinoma (HCC):

    • Risk: ↑ in all cirrhotic patients.
    • Surveillance: Ultrasound (± AFP) q6mo. AFP = tumor marker.

Systemic complications of liver cirrhosis diagram

High‑Yield Points - ⚡ Biggest Takeaways

  • Cirrhosis is irreversible liver fibrosis with nodular regeneration, primarily caused by alcohol and viral hepatitis.
  • Portal hypertension is a key consequence, leading to ascites, esophageal varices, and splenomegaly.
  • Hepatic encephalopathy, marked by asterixis, results from ↑ ammonia.
  • Spontaneous Bacterial Peritonitis (SBP) in ascites: diagnose with ascitic fluid PMN > 250/mm³.
  • Risk of Hepatocellular Carcinoma (HCC) necessitates screening with AFP and ultrasound.
  • Child-Pugh and MELD scores are crucial for prognosis and transplant listing.
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Practice Questions: Cirrhosis and Its Complications

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A 55-year-old man with a history of cirrhosis and ascites presents with fever and abdominal pain. Paracentesis reveals an elevated neutrophil count. What is the most likely diagnosis?

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Flashcards: Cirrhosis and Its Complications

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The fibrosis seen in cirrhosis is mediated by _____ from stellate (ito) cells

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The fibrosis seen in cirrhosis is mediated by _____ from stellate (ito) cells

TGF-

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