Table 1 Patients’ characteristics
From: Role of postoperative radiotherapy in resected adenoid cystic carcinoma of the head and neck
No | % | Â |
|---|---|---|
Sex | ||
 Male | 81 | 43.3 |
 Female | 106 | 56.7 |
Location | ||
 Parotid | 29 | 15.5 |
 Submandibular | 37 | 19.8 |
 Sublingual | 16 | 8.6 |
 Minor salivary gland | 105 | 56.1 |
Histologic grade | ||
 1 | 76 | 40.6 |
 2 | 77 | 41.2 |
 3 | 20 | 10.7 |
 Unknown | 14 | 7.5 |
Tumor size (cm) | ||
 Median 2.5 (0.4–9.0) |  |  |
T stage | ||
 T1 | 52 | 0.5 |
 T2 | 62 | 27.8 |
 T3 | 32 | 33.2 |
 T4 | 40 | 17.1 |
 Tx | 1 | 21.4 |
N stage | ||
 N0 | 173 | 92.5 |
 N1 | 6 | 3.2 |
 N2 | 8 | 4.3 |
Extracapsular extension | ||
 No | 176 | 94.1 |
 Yes | 11 | 5.9 |
Lymph node dissection | ||
 Not performed | 131 | 70.1 |
 Performed | 56 | 29.9 |
Surgical margin | ||
 Positive | 104 | 55.6 |
 Close | 57 | 30.5 |
 Negative | 26 | 13.9 |
PNI | ||
 No | 95 | 50.8 |
 Yes | 92 | 49.2 |
LVI | ||
 No | 156 | 83.4 |
 Yes | 31 | 16.6 |
Nerve invasion | ||
 No | 173 | 92.5 |
 Yes | 14 | 7.5 |
Bone invasion | ||
 No | 146 | 78.0 |
 Yes | 41 | 21.9 |
Treatment type | ||
 Surgery only | 61 | 32.6 |
 Surgery + postop RT | 106 | 56.7 |
 Surgery + postop CCRT | 16 | 8.6 |
 Preop CTx + surgery + postop RT | 2 | 1.1 |
 Preop CCRT + surgery | 1 | 0.5 |
 Preop RT + surgery | 1 | 0.5 |
 RT technique | ||
3D CRT | 22 | 17.5 |
 IMRT | 100 | 79.4 |
 Unknown | 4 | 3.2 |
RT field | ||
 Tumor bed | 47 | 37.3 |
 Tumor bed + elective LN area | 75 | 59.5 |
 Unknown | 4 | 3.2 |
RT dose (total, Gy) | ||
 Median 63.0 (36.0–70.4) |  |  |
Neck treatment | ||
 Not performed | 83 | 44.4 |
 Performed | 104 | 55.6 |
 Aim of neck treatment | ||
Therapeutic | 14 | 13.5 |
 Elective | 90 | 86.5 |
Type of neck treatment | ||
 Elective neck dissection | 29 | 27.9 |
 Elective neck irradiation | 47 | 45.2 |
 Elective neck dissection + irradiation | 14 | 13.5 |
 Therapeutic neck irradiation | 1 | 0.9 |
 Therapeutic neck dissection + irradiation | 13 | 12.5 |