TABLE 1.
Characteristics of 304 patients with salivary duct carcinoma
| No. of patients (%) | |
|---|---|
| Age (year); median = 68 (27–91) | |
| ≤49 | 34 (11) |
| 50–59 | 53 (17) |
| 60–69 | 99 (33) |
| 70–79 | 81 (27) |
| ≥80 | 37 (12) |
| Gender | |
| Male | 253 (83) |
| Female | 51 (17) |
| Site | |
| Parotid gland | 238 (78) |
| SMG | 55 (18) |
| Others | 11 (3.6) |
| CXPA | |
| CXPA(−)/de novo cancer | 121 (40) |
| CXPA(+): IC | 47 (15) |
| CXPA(+): MinI | 23 (7.6) |
| CXPA(+): WI | 112 (37) |
| Unknown | 1 (0.3) |
| Stage | |
| Stage 0 | 2 (0.7) |
| Stage I | 58 (19) |
| Stage II | 33 (11) |
| Stage III | 45 (15) |
| Stage IVA | 118 (39) |
| Stage IVB | 19 (6) |
| Stage IVC | 19 (6) |
| Unknown | 10 (3.3) |
| No. of LN metastasis | |
| 0 | 126 (41) |
| 1–10 | 102 (34) |
| ≥11 | 57 (19) |
| Unknown | 19 (6) |
| Therapy | |
| S | 107 (35) |
| S + POT | 197 (65) |
Abbreviations: CXPA, carcinoma ex pleomorphic adenoma; IC, intracapsular; LN, lymph node; MinI, minimally invasive; POT, postoperative therapy; S, surgery; SMG, submandibular gland; WI, widely invasive.