bilateral subcutaneous facial lumps

Background info:
I was dx 4 months ago with cirrhosis of the liver (non-alcoholic) that resulted from previously undiagnosed auto-immune hepatitis.

My tx regimen began with and included prednisone (30mg titrating down) and azathioprine (150 plus- titrating up) for approximately 2 years.
I was unable to tolerate the azathioprine and now take 750 mg cellcept 2x each day and 20 mg prednisone.

Question:
I have developed hardened, subcutaneous facial lumps (bilateral) along with the facial swelling from the meds.  There are two pair of lumps, both can be traced in a line from the middle point of my eyes down to my cheeks, and then again in in line down along the mandible at the corners of the mouth.   They are each about 1.5 inches in diameter.
Is this something I should be concerned about?  
I am aware that lymphoma is a side-effect of the meds that I am taking.

Thanks for your help.
Monica