Yes. I heard of doing it post treatment, and it's called adjunctive chemo therapy. For my last treatment, my RO asked me if my MO was going to give me more chemo/targeted therapy after treatment completion, which did not happen. My local oncologist is looking into Tarceva, as chemo prevention, but that is different.

There are no standardized treatment plans that doctors must follow, just guidelines, set forth by NCCN, and other clinical organizations, so each hospital, the doctor, and their experience may be different in their treatments, and so is each patient, and needs. A few here had adjunctive chemo therapy, but most usually not. The tumor size, T4, is large, and RO probably doesn't want to wait since radiation continues to work for an additional 6 weeks post treatment, so the chemo will still act as a radio sensitizer to make radiation work better. With that, also comes more toxicities, which is based on the type of chemo or targeted therapy, amount, rate of infusion, and duration, and that's the MO's area of concern.

I hope this helps, and good luck.