What are the restrictions on going back to work after cancer?

Working with Cancer. Only your oncology team can make that call. If your immune system is suppressed because of chemotherapy or bio therapy, it might be best to avoid crowds at the office. Many cancer sufferers are perfectly capable of returning to a full, productive lifestyle, however, during and after treatment.
Depends. Depends on what type of cancer and the treatments needed. Surgical treatments may take 4-8 weeks for recovery. Chemo and radiation may be even longer. For most patients i think the sooner they can return to normal activity the better.