Primary Biliary Cholangitis (Primary Biliary Cirrhosis)
An autoimmune disease of the liver's bile ducts
Quick Facts
- Type: Autoimmune liver disease
- What it damages: Small bile ducts in the liver
- More common in: Middle-aged women
- Key treatment: Ursodeoxycholic acid (UDCA)
Overview
Primary biliary cholangitis, formerly called primary biliary cirrhosis, is a long-term autoimmune disease in which the immune system slowly attacks and damages the small bile ducts inside the liver. These ducts carry bile, a fluid that helps with digestion, out of the liver. When they are damaged, bile builds up and gradually injures liver cells.
Over many years this can lead to scarring (fibrosis) and, in some people, advanced scarring called cirrhosis. The disease was renamed because most people are diagnosed before cirrhosis develops. It is far more common in women, usually appearing in middle age, and while there is no cure, treatment can slow its progression and relieve symptoms.
Symptoms
Many people have no symptoms early on and are diagnosed after a routine blood test shows abnormal liver results. When symptoms appear, they often include:
- Persistent fatigue
- Itchy skin, sometimes intense
- Dry eyes and mouth
- Pain or discomfort in the upper right abdomen
- Yellowing of the skin and eyes (jaundice) in later stages
- Darkening of the skin
- Small fatty deposits on the skin or around the eyes
As the disease advances, complications such as bone thinning, high cholesterol, and signs of liver scarring may develop.
Causes
The exact cause of primary biliary cholangitis is not known, but it is considered an autoimmune disease, meaning the immune system mistakenly targets the body's own tissue, in this case the bile ducts.
- Immune attack: Immune cells damage the cells lining the small bile ducts.
- Genetics: The condition is more common in people with a family history, suggesting inherited susceptibility.
- Environmental triggers: Infections or other exposures may help set off the immune response in genetically susceptible people.
It is not caused by alcohol and is not contagious.
Risk Factors
- Being female
- Being middle-aged, typically between 30 and 60
- A family history of the disease
- Having other autoimmune conditions, such as Sjogren syndrome, thyroid disease, or rheumatoid arthritis
Diagnosis
Diagnosis is usually based on blood tests and sometimes imaging:
- Liver blood tests: Show a pattern suggesting bile duct injury, especially a raised enzyme called alkaline phosphatase.
- Antibody testing: Anti-mitochondrial antibodies are found in most people with the disease and strongly support the diagnosis.
- Imaging: Ultrasound or other scans to rule out blockages and assess the liver.
- Liver biopsy: Occasionally used to confirm the diagnosis or assess the degree of scarring.
Treatment
Treatment focuses on slowing the disease, relieving symptoms, and preventing complications:
- Ursodeoxycholic acid (UDCA): The main medication, which helps bile move through the liver and can slow progression, especially when started early.
- Additional medications: Other drugs may be added for people who do not respond fully to UDCA.
- Symptom relief: Treatments for itching, dry eyes and mouth, and bone protection for osteoporosis.
- Liver transplant: Considered for advanced disease with liver failure.
Regular monitoring helps track the disease and catch complications early.
Self-Care and Prevention
- Take prescribed medication consistently and keep follow-up appointments
- Avoid alcohol to protect the liver
- Eat a balanced diet and get enough calcium and vitamin D for bone health
- Get recommended vaccinations, such as for hepatitis
- Have cholesterol and bone density checked as advised
When to See a Doctor
See a doctor if you have ongoing fatigue, persistent itching, or yellowing of the skin or eyes, or if a blood test shows abnormal liver results. Seek emergency care for vomiting blood, black or tarry stools, confusion or marked drowsiness, severe abdominal swelling, or deepening jaundice, which can signal advanced liver problems that need urgent attention.
Frequently Asked Questions
Is primary biliary cholangitis the same as cirrhosis?
Not exactly. The disease was once called primary biliary cirrhosis, but the name was changed because most people are diagnosed before cirrhosis develops. It damages the bile ducts and can lead to cirrhosis over time, but having the disease does not mean you already have cirrhosis.
Is PBC caused by alcohol?
No. Unlike some forms of liver scarring, primary biliary cholangitis is an autoimmune disease, not the result of alcohol. Still, avoiding alcohol is recommended to protect the liver.
Can PBC be cured?
There is no cure, but treatment with ursodeoxycholic acid and other medications can slow its progression, especially when started early. Many people live for years with well-controlled disease, and liver transplant is an option for advanced cases.
Why does PBC cause itching?
The buildup of bile substances in the body irritates the skin and can cause intense itching, which is one of the most common symptoms. There are treatments that can help relieve this itching, so it is worth discussing with a doctor.
Who is most likely to get PBC?
It most often affects women in middle age, particularly between 30 and 60, and is more common in those with a family history or other autoimmune conditions. It is far less common in men.
References
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Primary Biliary Cholangitis (Primary Biliary Cirrhosis).
- Mayo Clinic. Primary biliary cholangitis — Symptoms and causes.
- American Liver Foundation. Primary biliary cholangitis.
- MedlinePlus, U.S. National Library of Medicine. Primary biliary cholangitis.