Sample results
Primary Biliary Cirrhosis (PBC) is a chronic autoimmune disease where the immune system attacks and destroys the small bile ducts in the liver. It is caused by autoimmune antibodies, particularly anti-mitochondrial antibodies (AMA), that target bile duct cells and cause progressive liver damage. The Smooth Muscle Antibody with Reflex to Titer is the most important test for distinguishing PBC from other autoimmune liver conditions.
Primary Biliary Cirrhosis is caused by an autoimmune reaction where your immune system mistakenly attacks the small bile ducts in your liver. Anti-mitochondrial antibodies (AMA), found in about 95% of PBC patients, target proteins in the mitochondria of bile duct cells, leading to chronic inflammation and progressive destruction. Over time, this damage causes bile to build up in the liver, leading to scarring and cirrhosis.
The Smooth Muscle Antibody with Reflex to Titer is the most important test for distinguishing Primary Biliary Cirrhosis from other autoimmune liver diseases because it helps rule out conditions like autoimmune hepatitis. In PBC, smooth muscle antibodies are typically absent or found at low levels, which supports the diagnosis when combined with other findings. The Cytosolic 5'-Nucleotidase 1A (cN-1A) Antibody test provides additional diagnostic evidence by detecting specialized antibodies that contribute to bile duct damage in PBC patients. Together, these antibody tests help confirm the autoimmune nature of the liver damage and distinguish PBC from other liver conditions.
You should get tested if you experience persistent fatigue that interferes with daily activities, itchy skin without a rash, yellowing of the skin or eyes, or dark urine. Testing is also important if you have unexplained elevated liver enzymes on routine blood work, a family history of autoimmune diseases, or other autoimmune conditions like thyroid disease or Sjogren syndrome. Early detection allows for treatment that can slow disease progression and prevent complications.
What this means
Your test came back negative, meaning no smooth muscle antibodies were detected in your blood. This is the expected and healthy result, making autoimmune hepatitis unlikely as the cause of any symptoms you may be experiencing.
Recommended actions
Continue monitoring liver health with regular wellness checkups
Discuss other potential causes of symptoms with your doctor if fatigue or discomfort persists
Maintain a balanced diet and limit alcohol to support liver function
Consider retesting if new liver-related symptoms develop or liver enzyme levels become elevated
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Sample results
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