Hi Wayne,
Back to your original question. There are indeed a lot of variables impacting on when you can resume your work. Say, what is your original job, the intensity of treatment you received, etc. I have been on medical leave for almost seven months before my doctor considered me 'fit' for my full time job. In fact, when I was just 2 to 3 months after treatment, the side effects were so frustrating that I thought I had to retire from my job.Things did change better slowly and gradually and when I returned to my job, I didn't believe that I could take up the whole load of original duties I used to have. I could, eventually and could perform even better than before. Here the colleagues's support and tolerance are important. I didn't work long because the escalating job stress made me sit back and think of early retirement. So after working for 3 whole years after treatment, I finally retired last September. Don't push yourself too hard; otherwise depression might set in ,just like what had happened to me. Be patient and you shouldn't be too far from your working life.

Karen