Would you give post-operative radiation therapy and/or chemotherapy after an APR for anal cancer if inguinal lymph nodes were involved but margins were negative?

This question has medicaolegal implications. We should not try to make up for the bad decisions that others have made. Since the standard of care was not followed, I would be hesitant and careful about causing any significant risk. Elective radiation to the inguinal areas would put the patient at ri...