Question: How do doctors diagnose primary biliary cholangitis?
Answer: Doctors diagnose primary biliary cholangitis based on your medical and family history, a physical exam, and the results of medical tests.

Medical and family history

Your doctor will ask you about your symptoms. He or she will also ask

whether you have a history ofcertain autoimmune diseases
whether one of your parents or siblings has been diagnosed with primary biliary cholangitis
whether you have a history of infections and exposure to certain chemicals

Physical exam

Your doctor will examine your body, use a stethoscope to listen to sounds in your abdomen, and tap or press on specific areas of your abdomen. He or she will

look for yellowing of the whites of your eyes and your skin
check to see if yourliverandspleenare larger than they should be
check for abdominal tenderness or pain, particularly in the upper-right side of your abdomen
Question: What tests do doctors use to diagnose primary biliary cholangitis?
Answer: Blood tests

For a blood test, a health care professional will take a blood sample from you and send the sample to a lab. Your doctor may recommend the following blood tests.

Anti-mitochondrial antibodies (AMA)

Anti-mitochondrial antibodies are found in the blood of about 95% of people with primary biliary cholangitis.4

Liver tests

Liver tests can show abnormal liver enzyme levels, which may be a sign of damage in your liver or biliary tract. Higher-than-normal levels of the liver enzyme alkaline phosphatase occur in people with diseases that destroy or block the bile ducts, such as primary biliary cholangitis.

Your doctor may diagnose primary biliary cholangitis if you have anti-mitochondrial antibodies and higher-than-normal levels of alkaline phosphatase in your blood, even if you have no other signs or symptoms of the disease.

Cholesterol

People with primary biliary cholangitis may have higher-than-normal cholesterol levels.

Imaging tests

Your doctor may use imaging tests such as x-rays and ultrasounds to help diagnose primary biliary cholangitis by ruling out other causes of bile duct damage, such as gallstones, bile duct strictures, and tumors.

Liver biopsy

During a liver biopsy, a doctor will take small pieces of tissue from the liver. A pathologist will examine the tissue with a microscope. Your doctor may perform a liver biopsy to

rule out other diseases that may be causing your symptoms
confirm the diagnosis of primary biliary cholangitis
determine whether the disease is advanced—as shown by the amount of liver scarring orcirrhosis—or is very active