Characteristics | n | Percentage |
---|---|---|
Median age (range) | 57 (23–86) |  |
Sex | Â | Â |
  Male | 36 | 70.6 |
  Female | 15 | 29.4 |
Primary site | Â | Â |
  Parotid gland | 27 | 52.9 |
  Submandibular gland | 23 | 45.1 |
  Sublingual gland | 1 | 2 |
Pleomorphic adenoma operation history | Â | Â |
  No | 41 | 80.4 |
  Yes | 10 | 19.6 |
Histological grade | Â | Â |
  Low | 15 | 29.4 |
  Intermediate | 19 | 37.3 |
  High | 17 | 33.3 |
Invasiveness | Â | Â |
  Non-invasive | 9 | 17.6 |
  Minimally invasive | 3 | 5.9 |
  Invasive | 39 | 76.5 |
Carcinomatous component | Â | Â |
  <50% | 7 | 13.7 |
  >50% | 44 | 86.3 |
T stage | Â | Â |
  1 | 10 | 19.6 |
  2 | 14 | 27.5 |
  3 | 8 | 15.7 |
  4 | 19 | 37.3 |
Lymph node involvement | Â | Â |
  Negative | 34 | 66.7 |
  Positive | 17 | 33.3 |
Clinical stage | Â | Â |
  I | 8 | 15.7 |
  II | 9 | 17.6 |
  III | 8 | 15.7 |
  IV | 26 | 51.0 |
Perineural invasion | Â | Â |
  Negative | 28 | 54.9 |
  Positive | 23 | 45.1 |
Postoperative radiotherapy | Â | Â |
  No | 30 | 58.8 |
  Yes | 21 | 41.2 |
Postoperative chemotherapy | Â | Â |
  No | 48 | 94.1 |
  Yes | 3 | 5.9 |
Neck dissection | Â | Â |
  No | 5 | 9.8 |
  Yes | 46 | 90.2 |