EBRO 2017

Risk grouping in postoperative radiotherapy for oral cancer (217 patients)

1.0

Intermediate risk

.9

.8

.7

High risk

.6

Loco-regional control

.5

.4

.3

High risk: • close or pos. margin • extranodal spread • ≥2 other risk factors

Local-regional control

.2

.1

0.0

0

12

24

36

48

60

Time from surgery

Langendijk 2003