What dose/fractionation do you use when treating SCC of the vagina with vaginal cylinder brachytherapy after EBRT?  

With stage I/II vaginal cancer and an excellent response to 4500cGy EBRT with <5mm residual thickness of tumor remaining, what is your dose/fractionation when treating with vaginal cylinder brachytherapy?  Do you prescribe to 0.5cm from the surface of the cylinder?

Answer from: Radiation Oncologist at Academic Institution