1738-1739 / 2063
Head & neck
•
Risk of late damage
is higher in retreated
patients…
•
But cumulative total
dose for 20%
complication rate at 5 y
is higher than predicted
from single course
treatment
(EQD2
3
= 86 vs 67 Gy)
indicating
partial
recovery!
Complication free survival (%)
0
2
4
6
8
10
0
20
40
60
80
100
Time from (re)irradiation (years)
Reirradiation
N = 487
Single course
N = 3635
Lee AWM et al. Int J Radiat Oncol Biol Phys 20000