NAC | |
 Yes | 8 |
 No | 64 |
Bi-lateral ND | |
 Yes | 26 |
 No | 46 |
Treatment for primary lesion | |
 Surgery | 60 |
 EBRT | 9 |
 BT | 3 |
Degree of differentiation | |
 Poorly differentiated | 20 |
 Moderately differentiated | 23 |
 Well differentiated | 15 |
 Unknown | 14 |
Extracapsular spread | |
 Yes | 46 |
 No | 10 |
 Unknown | 16 |
Positive/close margin | |
 Yes | 40 |
 No | 32 |
Concurrent systemic therapy | |
 CDDP | 17 |
 Cetuximab | 2 |
 TS-1 | 2 |
 None | 51 |
RT total dose (Gy) | |
 Median | 66 |
 Range | 60–74 |
Radiation technique | |
 3DCRT | 14 |
 IMRT | 58 |