My brother had y90 treatment to the left lobe of his liver on July 7. At that time his tumor marker number was 3400 (he has advanced HCC with multiple tumors in both lobes.) It took him EIGHT weeks to start feeling well again from all the side effects, and he had them all. At three weeks post treatment his tumor marker was 7,000! Basically they told him the Y90 had not worked and he should go on hospice. However, His latest Tumor marker number was 900! The team has been amazed at his turn around and has now scheduled a second Y90 for the right lobe. So, don’t give up, and don’t believe the information that says side effects should last about two weeks.