Table 1. Clinical data of the patients included in the study.
| Patients' characteristics | N (%) |
|---|---|
| Patients | 51 |
| Male | 38 (74.5%) |
| Female | 13 (25.5%) |
| Age (years) | |
| Mean ± SD | 66.2 ± 13.0 |
| Median | 68 |
| Minimum/Maximum | 36/90 |
| Histology | |
| SDC de novo | 39 (76.5%) |
| SDC ex pleomorphic adenoma | 12 (23.5%) |
| Resection margins | |
| R0 | 25 (49.0%) |
| R1 | 17 (33.3%) |
| R2 | 1 (2.0%) |
| Rx | 8 (15.7%) |
| pT-stage | |
| pTx | 1 (2.0%) |
| pT1 | 12 (23.5%) |
| pT2 | 5 (9.8%) |
| pT3 | 16 (31.4%) |
| pT4a | 16 (31.4%) |
| pT4b | 1 (2.0%) |
| pN-stage | |
| pNx | 2 (3.9%) |
| pN0 | 10 (19.6%) |
| pN1 | 8 (15.7%) |
| pN2 | 30 (58.8%) |
| pN3 | 1 (2.0%) |
| Extracapsular spread | |
| Unknown | 23 (45.1%) |
| Yes | 15 (29.4%) |
| No | 13 (25.5%) |
| cM-stage | |
| cMx | 12 (23.6%) |
| cM0 | 30 (58.8%) |
| cM1 | 9 (17.6%) |
| Lymphangiosis | |
| Unknown | 15 (29.4%) |
| Yes | 22 (43.1%) |
| No | 14 (27.5%) |
| Hemangiosis | |
| Unknown | 18 (35.3%) |
| Yes | 14 (27.5%) |
| No | 19 (37.3%) |
| Perineural invasion | |
| Unknown | 19 (37.3%) |
| Yes | 22 (43.1%) |
| No | 10 (19.6%) |
| Type of parotidectomy | |
| Unknown | 1 (2.0%) |
| Lateral | 4 (7.8%) |
| Total | 24 (47.1%) |
| Radical | 20 (39.2%) |
| Subtotal | 2 (3.9%) |
| Neck dissection | |
| Yes | 49 (96.1%) |
| No | 2 (3.9%) |