Cld in children
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"chronic lung disease" OR "bronchopulmonary dysplasia" children
Chronic liver disease in children
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"chronic liver disease" AND children
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Chronic Liver Disease (CLD) in Children
Definition
Chronic liver disease in children refers to persistent hepatic injury or dysfunction lasting more than 3-6 months, resulting in fibrosis, cirrhosis, or end-stage liver failure. Unlike adults (where alcohol and viral hepatitis dominate), pediatric CLD has a distinct etiology profile that varies by age group.
Causes by Age Group
Neonates / Infants
| Cause | Key Points |
|---|---|
| Biliary atresia | Most common cause of CLD death in early childhood; accounts for 50-60% of liver transplants in children |
| Alagille syndrome | Paucity of interlobular bile ducts; associated with cardiac, vertebral, ocular anomalies |
| Progressive familial intrahepatic cholestasis (PFIC) | Genetic defect in bile transport |
| Alpha-1 antitrypsin deficiency | Autosomal codominant; PiZZ genotype causes cirrhosis in ~15% of affected children |
| Galactosemia / Tyrosinemia | Metabolic disorders causing neonatal hepatitis syndrome |
| Neonatal hepatitis | Idiopathic or due to CMV, rubella, herpes, toxoplasmosis |
| Cystic fibrosis | Biliary obstruction from inspissated secretions |
Older Children / Adolescents
| Cause | Key Points |
|---|---|
| NAFLD/MASLD | Most common liver disease in children in the US; driven by obesity and insulin resistance |
| Autoimmune hepatitis (AIH) | Types 1 and 2; requires immunosuppression (prednisone + azathioprine or budesonide) |
| Wilson disease | Copper accumulation; presents from age ~5 years; Kayser-Fleischer rings, liver disease, neuropsychiatric features |
| Viral hepatitis (HBV, HCV) | Chronic HBV from vertical transmission; HCV in at-risk groups |
| Primary sclerosing cholangitis (PSC) | Often associated with IBD (70% of cases) in adolescents |
Clinical Features
Symptoms
- Jaundice, pruritus
- Fatigue, anorexia, failure to thrive
- Abdominal distension (ascites)
- Bleeding tendency (coagulopathy)
Signs of Chronic Liver Disease
- Hepatosplenomegaly (most common finding)
- Palmar erythema
- Spider nevi
- Clubbing
- Cutaneous xanthomas
- Prominent abdominal vessels / caput medusae
- Ascites
- Growth failure
Note: Clinically evident hepatic encephalopathy in children with CLD is less common than in adults - it may be underdiagnosed because behavioral changes are attributed to other causes. - Bradley and Daroff's Neurology in Clinical Practice
Investigations
Liver Function Tests
| Category | Tests |
|---|---|
| Synthetic/metabolic function | Albumin, prealbumin, INR, aPTT, GGT, cholesterol, bilirubin, ammonia |
| Liver cell injury | AST, ALT, LDH |
| Biliary system | Total and direct bilirubin, urobilinogen, GGT, alkaline phosphatase |
Further Workup (etiology-directed)
- Serum ceruloplasmin + 24h urine copper (Wilson disease) - penicillamine challenge test diagnostic if urine copper >25 µmol/day
- Alpha-1 antitrypsin level + phenotype (Pi typing)
- Autoantibodies: ANA, ASMA, anti-LKM1 (AIH types 1 and 2)
- Viral serology: HBsAg, anti-HCV, CMV, EBV
- Metabolic screen: galactose-1-phosphate uridyltransferase, urine succinylacetone (tyrosinemia)
- Sweat chloride / CFTR mutation (cystic fibrosis)
Imaging
- Abdominal ultrasound with Doppler - first-line
- MRI/MRCP for biliary tract disease (PSC, biliary atresia)
- Elastography (fibroscan) for non-invasive fibrosis staging
Histology
- Liver biopsy remains gold standard for staging fibrosis and confirming etiology
Complications
| Complication | Details |
|---|---|
| Portal hypertension | Esophageal varices are the most common cause of severe upper GI bleeding in children with portal hypertension; portal vein thrombosis accounts for ~50% of cases in children |
| Ascites | Requires sodium restriction + diuretics |
| Hepatic encephalopathy | Less obvious in children; look for behavioral/cognitive changes |
| Coagulopathy | Factor VII depleted first in acute-on-chronic liver failure |
| Fat-soluble vitamin deficiency | Vitamins A, D, E, K - important to supplement in cholestatic CLD |
| Growth failure / malnutrition | Major concern in pediatric CLD |
| Hepatorenal syndrome | End-stage complication |
| Hepatocellular carcinoma | Less common in pediatric CLD than adults; rare in Wilson disease |
Severity Scoring
PELD Score (Pediatric End-Stage Liver Disease)
Used for children <12 years on transplant waiting lists. Predicts 3-month mortality.
Variables used:
- Serum bilirubin
- INR
- Serum albumin
- Age (<1 year)
- Growth failure (≤2 SD below mean for age)
Unlike MELD (adults), PELD does not include serum creatinine - instead incorporates albumin and growth failure, reflecting the unique physiology of pediatric liver disease. - Sleisenger and Fordtran's GI and Liver Disease
Management
General Supportive Care
- Nutrition: Optimize caloric intake; nasogastric/enteric feeds if oral intake poor; high-calorie, fat-modified diet
- Fat-soluble vitamins: Supplement A, D, E, K (especially in cholestatic disease)
- Salt restriction + diuretics (spironolactone ± furosemide) for ascites
- Beta-blockers (propranolol) or endoscopic band ligation for variceal prophylaxis
Disease-Specific Treatment
| Disease | Treatment |
|---|---|
| Biliary atresia | Kasai portoenterostomy (ideally <8 weeks of age); liver transplant for failures (5-year survival 75-94%) |
| Wilson disease | D-penicillamine or trientine; zinc for maintenance; low-copper diet |
| Autoimmune hepatitis | Prednisone + azathioprine; budesonide as alternative in children/adolescents |
| Alpha-1 antitrypsin deficiency | Supportive; liver transplant corrects metabolic defect |
| NAFLD | Lifestyle modification (diet + exercise); no proven pharmacotherapy; bariatric surgery for severe comorbidities |
| Chronic HBV | Antivirals (tenofovir/entecavir) - refer to HCV guidelines for children |
| PSC | UDCA (controversial); treat IBD; transplant for end-stage disease |
| Alagille syndrome | Biliary diversion; treat pruritus; cardiac management; transplant |
Liver Transplantation
- Indicated for end-stage disease, PELD score escalation, failed Kasai, metabolic disorders correctable by transplantation
- Biliary atresia is the most common pediatric transplant indication
- Living donor and split-liver transplants widely used in children
- Post-transplant 5-year survival: 75-94%
Key Pediatric-Specific Points
- Biliary atresia must be diagnosed and treated urgently - delay beyond 8 weeks significantly worsens outcome
- Wilson disease must be considered in any child >5 years with unexplained hepatitis, hemolytic anemia, or neuropsychiatric symptoms
- NAFLD is now the most common liver disease in children in the US and is rising with obesity rates
- Growth failure is a major morbidity marker and is incorporated into the PELD prognostic score
- Fat-soluble vitamin deficiency is a key management target, especially in cholestatic diseases
- The PELD score (not MELD) is used for transplant listing in children <12 years
Sources: The Harriet Lane Handbook (23rd ed.) | Sleisenger and Fordtran's GI and Liver Disease | Robbins & Kumar Basic Pathology | Bradley and Daroff's Neurology in Clinical Practice | Murray & Nadel's Textbook of Respiratory Medicine
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