What is recurrent anal cancer?

It came back. Recurrent refers to a tumor that had gone away but then comes back.
Cancer that regrew. Recurrent simply means that it grew back. The explanations are that it was never really adequately treated in the first place or the cancer was resistant to the medications. This can be a difficult problem. There is no standardized recommendation. Instead, you should meet with your surgeon, your radiation oncologist, and your medical oncologist to discuss.