What is the mechanism of the effect of preoperative
CRT in preventing local recurrence?
1. by treating microscopic areas not seen
(discontinuous deposits) and so not routinely
removed by surgeon ?
2. by treating areas not routinely removed by surgeon
(external iliac nodes/obturator nodes etc..) ?
3. by countering spillage ie rendering cells non-viable
with RT?
4. by countering spillage growing ie tumour bed effect?
5. by compensating for poor surgical technique?
6. by damaging tumour /vasculature and causing
immune effects/loss of tolerance etc..?