Biliary Atresia – Causes, Symptoms & Treatment
Biliary atresia is a rare and serious liver disease in newborns in which the bile ducts are absent, blocked, or scarred, preventing normal bile flow.
Things worth knowing about "Biliary Atresia"
Biliary atresia is a rare and serious liver disease in newborns in which the bile ducts are absent, blocked, or scarred, preventing normal bile flow.
What Is Biliary Atresia?
Biliary atresia is a rare but life-threatening liver disease that affects newborns. In this condition, the bile ducts – the small tubes that carry bile from the liver to the small intestine – are either absent, blocked, or destroyed by inflammation and scarring. As a result, bile cannot flow out of the liver, causing it to build up and damage liver tissue over time.
The condition affects approximately 1 in every 10,000 to 15,000 live births and is one of the leading causes of liver transplantation in children worldwide.
Causes
The exact cause of biliary atresia is not yet fully understood. Researchers believe it results from a combination of factors:
- Immune-mediated inflammation: A misdirected immune response, possibly triggered by a viral infection (e.g., rotavirus or reovirus), may attack and damage the bile ducts.
- Genetic factors: In rare cases, genetic mutations may contribute to the development of the condition.
- Abnormal fetal development: In some children, the bile ducts fail to develop properly during pregnancy (embryonic form).
- Environmental triggers: Exposure to certain toxins or infections during pregnancy is also under investigation.
Symptoms
Symptoms typically appear within the first few weeks of life and may initially be mistaken for normal newborn jaundice:
- Persistent jaundice: Yellowing of the skin and whites of the eyes lasting beyond two to three weeks of age.
- Pale or clay-colored stools: Stools lack their normal brown color because bile is not reaching the intestine.
- Dark urine: Bile pigments accumulating in the blood are excreted through the kidneys, turning urine dark brown or tea-colored.
- Enlarged liver (hepatomegaly) and spleen (splenomegaly).
- Poor weight gain or weight loss.
- Irritability and general discomfort in the infant.
Diagnosis
Early and accurate diagnosis is critical because treatment must be performed as soon as possible. Diagnostic tests include:
- Blood tests: Measurement of liver enzymes, bilirubin (direct and indirect), and other liver function markers.
- Stool color screening: In some countries, a stool color card program is used to identify pale stools early in newborns.
- Ultrasound (sonography): Assessment of the liver, gallbladder, and bile duct anatomy.
- Liver biopsy: A small tissue sample is examined under a microscope to assess liver damage and bile duct changes.
- Intraoperative cholangiography: A contrast dye is injected into the bile ducts during surgery to visualize their structure and patency.
- Hepatobiliary scintigraphy (HIDA scan): A nuclear medicine imaging test that evaluates bile flow from the liver.
Treatment
Biliary atresia must be treated as early as possible, ideally within the first 60 days of life, to prevent irreversible liver damage.
Kasai Procedure (Hepatoportoenterostomy)
The first line of surgical treatment is the Kasai procedure, named after Japanese surgeon Morio Kasai. During this operation, the damaged bile ducts are removed and a loop of the small intestine is attached directly to the liver, creating a new pathway for bile to drain. The earlier the procedure is performed, the better the chances of success.
Liver Transplantation
If the Kasai procedure does not restore adequate bile flow, or if liver damage has already progressed significantly, a liver transplantation becomes necessary. Biliary atresia is the most common indication for pediatric liver transplantation worldwide. Most children who receive a transplant can lead a normal life.
Supportive Care
- Vitamin supplementation: Since fat-soluble vitamins (A, D, E, K) are poorly absorbed without adequate bile flow, supplementation is essential.
- High-calorie nutrition: To support healthy growth and development in affected infants.
- Medications: Ursodeoxycholic acid may be used to support bile flow after the Kasai procedure.
Prognosis
Without treatment, biliary atresia leads to liver cirrhosis and death within the first two years of life. With timely surgical intervention, many children survive without needing a transplant into school age. However, approximately 70–80 % of affected children will eventually require a liver transplant. After a successful transplant, the long-term prognosis is generally favorable, and most children develop normally.
References
- Hartley JL, Davenport M, Kelly DA. Biliary atresia. Lancet. 2009;374(9702):1704–1713. doi:10.1016/S0140-6736(09)60946-6
- Chardot C. Biliary atresia. Orphanet Journal of Rare Diseases. 2006;1:28. doi:10.1186/1750-1172-1-28
- Sokol RJ, Shepherd RW, Superina R, et al. Screening and outcomes in biliary atresia: summary of a National Institutes of Health workshop. Hepatology. 2007;46(2):566–581. doi:10.1002/hep.21790
Most purchased products
For your iron balance
Specially formulated for your iron balance with plant-based curry leaf iron, Lactoferrin CLN®, and natural Vitamin C from rose hips.
For your universal protection
As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.
For Healthy Oral Flora & Dental Care
Formulated lozenges with Dentalac®, probiotic lactic acid bacteria, and Lactoferrin CLN®The latest entries
3 Posts in this encyclopedia categorySelf-efficacy
Somatization
Psychoeducation
Most read entries
3 Posts in this encyclopedia categoryMagnesiumcarbonat
Calorie content
Cologne list
Related search terms: Biliary Atresia