Anti-smooth muscle antibody positivity

What it means

The presence in serum of antibodies against smooth muscle.

Anti smooth muscle antibody (SMA) may be present in a number of conditions including chronic active hepatitis, autoimmune hepatitis, cirrhosis, and infectious mononucleosis.

Rare diseases that can present with this8

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Smooth muscle antibody positive · Smooth muscle antibody positivity