Congenital biliary atresia

1) Disease Description (Causes and Symptoms)

• Definition: A disease in which the extrahepatic bile ducts (bile ducts outside the liver) are congenitally partially or completely obstructed, making bile excretion impossible. It mainly occurs in newborns and infants.
• Pathophysiology: Bile stasis develops due to bile duct obstruction, followed by progressive fibrosis around hepatocytes and bile ducts → may progress to cirrhosis, portal hypertension, and liver failure.
• Causes: The exact cause is unknown. Maternal infections (such as CMV), viral exposure, toxic substances, genetic predisposition, and immunological mechanisms have been reported as suspected contributing factors.
• Main symptoms
  • Jaundice lasting more than 2 weeks after birth (particularly with predominantly direct (conjugated) bilirubin)
  • Gray or white stools (due to steatorrhea or lack of bile)
  • Dark (black) urine
  • Hepatomegaly (palpable liver), splenomegaly
  • Ascites, poor nutritional status, growth retardation
  • Complications such as esophageal variceal bleeding (melena or vomiting blood) in advanced cases

2) Treatment Methods and Precautions

• Standard treatment
  • Kasai surgery (portoenterostomy): The obstructed extrahepatic bile duct area is removed, and part of the small intestine is used to connect the hepatic hilum (liver surface) to create a route for bile drainage. Performing the procedure as early as possible (ideally within 6–8 weeks after birth) is favorable for the prognosis.
  • Liver transplantation: Performed when Kasai surgery fails or progressive cirrhosis or liver failure develops. Outcomes of pediatric liver transplantation have improved greatly in recent years.
• Medications and supportive treatment
  • Before and after surgery: Consider antibiotics (when preventing or treating cholangitis) and choleretic agents (such as ursodeoxycholic acid)
  • Supplementation with fat-soluble vitamins (A, D, E, K) — deficiency may cause night blindness, bone disease, a tendency to bleed, neuromuscular problems, and other issues
  • Special formula containing medium-chain triglycerides (MCT) (to improve nutrient absorption)
• Lifestyle management and precautions
  • Because early diagnosis and surgery are decisive for the prognosis, immediate referral to pediatric gastroenterology or pediatric surgery is recommended when jaundice or gray stools are observed
  • When liver function is impaired, the risks of infection, bleeding, and nutritional deficiency increase → regular monitoring is necessary
  • Because of the risk of portal hypertension (esophageal varices), endoscopic examination and treatment are necessary if there is a tendency to bleed
  • Exercise caution when using hepatotoxic medications (e.g., some antibiotics and antituberculosis drugs) and consult the attending physician

3) Checklist Before an Outpatient Visit (Including Items to Bring and Sample Questions)

• Items to bring (recommended)
  • A list of all currently used medications and supplements (including doses and administration times)
  • Birth records (date of birth, whether jaundice was present at birth, colostrum intake, etc.) and neonatal test results (if available)
  • Previous test results: blood tests (bilirubin, AST/ALT, ALP, gamma-GT, prothrombin, etc.), ultrasound, hepatobiliary iminodiacetic acid (HIDA) scan, MRI (MRCP), etc.
  • Symptom records: duration of jaundice, photographs or records of stool (color) and urine (color), weight gain pattern, and presence of fever, vomiting, or bleeding
• Examples of items to confirm at the outpatient visit (information to show the doctor)
  • When jaundice began and how it has progressed (by week)
  • When changes in stool and urine color began and how frequently they occur
  • Feeding method (breast milk/formula/special formula) and weight gain pattern
  • Family history (liver disease, genetic disease, etc.)
• Documentation and preparation for tests
  • Recent vaccination status (related to infection prevention)
  • Preparation according to instructions, such as whether fasting or fluid restriction is required before testing

4) Examples of General Questions to Ask the Doctor

• What is the suspected cause of this condition?
• What are the advantages and disadvantages of the treatment options (surgery vs. conservative treatment), and when is the recommended timing?
• What course can be expected after Kasai surgery (when jaundice is expected to improve and how long hospitalization may last)?
• What are the major complications that may occur after surgery, and how can they be prevented?
• What is the long-term prognosis (growth, the need for liver transplantation, and restrictions on daily activities)?
• How should fat-soluble vitamins and nutritional supplements be provided? Which products do you recommend?
• What are the items and intervals for regular follow-up tests?

5) Examples of Disease-Specific Questions

• When is the optimal time to perform surgery (or additional tests)? Until how many weeks after birth is it recommended?
• If jaundice continues after Kasai surgery, what are the criteria for deciding the next step (such as liver transplantation)?

(Note: Because early diagnosis and early surgery have a major impact on the prognosis, prompt specialist evaluation is recommended when persistent jaundice or gray stools are observed.)