NAFLD - Non alcoholic fatty liver disease.
This is very common, characterized by deposits of fat in the liver cells. When these deposits cause inflammation and fat cells build up, it is known as NASH or non alcoholic steatohepatitis.
It is often very common in patients who have Type 2 diabtetes or are obese. Because of it being seen more and more in the general population, it is just likely that it occurs along with PBC as well in many cases.
If NAFLD is present along with PBC, it can sometimes limit the effectiveness of the PBC therapy as well as assessment of some blood tests.