1328 / 1983
Risk grouping in postoperative radiotherapy
for oral cancer (217 patients)
Time from surgery
60
48
36
24
12
0
Local-regional control
1.0
.9
.8
.7
.6
.5
.4
.3
.2
.1
0.0
High risk
Intermediate risk
Loco-regional control
High risk:
•
close or pos. margin
•
extranodal spread
•
≥2 other risk factors
Langendijk 2003