Autoimmune hepatitis is an inflammatory liver disease caused by the body's own immune system attacking cells in the liver. This can cause inflammation, scarring, and ultimately liver failure. One of the ways to diagnose autoimmune hepatitis is by testing for elevated levels of immunoglobulin G (IgG).
IgG is a type of antibody produced by the immune system in response to foreign substances (antigens) in the body. It is the most common type of antibody found in the blood and is responsible for protecting the body from infections and other foreign invaders. Elevated levels of IgG can be indicative of autoimmune hepatitis, as the body may be producing an increased amount of IgG in response to the inflammation caused by the autoimmune attack on the liver cells.
Elevated IgG levels can also be seen in other autoimmune diseases, such as systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA). Additionally, elevated IgG levels can be caused by other illnesses, such as chronic infections, parasitic infections, or certain medications. Therefore, it is important for a doctor to evaluate all potential causes before making a diagnosis of autoimmune hepatitis.
In summary, elevated IgG levels can be an indicator of autoimmune hepatitis. However, it is important for a doctor to evaluate other potential causes before making a diagnosis, as elevated IgG levels can also be seen in other autoimmune diseases and in other illnesses.