Autoimmune diseases are very common and often complex. Elevation of liver enzymes is a common side effect of Imuran, but also the AI hepatitis. The best way to assess disease vs medicine effect is to compare enzyme levels before treatment to levels after treatment. This can show a fluctuating baseline from the disease during diagnosis testing, the look at the levels a month or more after treatment started. It’s not easy as dates need to be accurate as to when drug was started. Labcorp results show a graph if you look at “trends “ on your Labcorp patient portal. Quest may have the same, i just don’t know.
The inflammation is microscopic and may not be severe enough to show up on imaging like CT scans. I hope that helps you and you feel better.