My 84 Yr Old Mother Lab Tests Show Elevated Liver

My 84 yr old mother lab tests show elevated liver enzymes at least 3-4x elevated. She has been on a statin for 50+ yrs? also takes Tylenol 2-3 x a day past 5 yrs for pain...mostly joints. Is it most likely the Statin causing this or should we be concerned. Her dr. Has ordered a liver ultra sound just to check it out. Any thoughts for us?