Table 2. Pathologic Characteristics of All Patients.
| Pathologic Variable | No. (%) |
|---|---|
| Tumor size, mean (SD), cm | 2.2 (1.7) |
| No. of tumors, mean (SD) | 2.2 (2.7) |
| Multifocal | 20 (10.1) |
| Tumor differentiation | |
| Well | 160 (91.4) |
| Moderate | 13 (7.4) |
| Poor | 2 (1.1) |
| Tumor grade | |
| Low | 97 (70.3) |
| Intermediate | 38 (27.5) |
| High | 3 (2.2) |
| Lymphovascular invasion | 98 (69.5) |
| Perineural invasion | 62 (50.8) |
| No. of lymph nodes retrieved, median (IQR) | 13 (7-19) |
| Lymph node positive | 154 (77.4) |
| No. of lymph nodes positive, median (IQR) | 3 (1-5) |
| Lymph node ratio, mean (SD) | 0.34 (0.28) |
| T stage | |
| TX | 3 (1.5) |
| T0 | 1 (0.5) |
| T1 | 22 (11.1) |
| T2 | 49 (24.7) |
| T3 | 89 (44.9) |
| T4 | 34 (17.2) |
| N stage | |
| NX | 19 (9.5) |
| N0 | 26 (13.1) |
| N1 | 154 (77.4) |
| M stage | |
| MX | 2 (1.0) |
| M0 | 193 (99) |
| Final resection status | |
| R0 | 179 (91.3) |
| R1 | 17 (8.7) |
Abbreviation: IQR, interquartile range.