question: I am having chemotherapy as my CEA was 65 and Petscan indicted that some liver cysts that have been there for 2 years, may have become cancerous. After 4 sessions of chemo the CEA is down to 10 but my gamma GT is up from 33 to 65. Could this be due to the chemo? I had a 5th session today (Wed) and after the 6th in 2 weeks I will have another Petscan to see if surgery is necessary. Should I be worried about the gamma GT as I drink wine most days but below the recommended maximum levels.