Table 1.
Clinical characteristics of patients with sacral chordoma and underwent computer navigation-aided surgery
| Characteristics | Values |
|---|---|
| Gender | |
| Male | 15 |
| Female | 11 |
| Primary or recurrence | |
| Primary | 21 |
| Recurrence | 5 |
| Levels of tumor involvement | |
| S1–S5 | 1 |
| S2–S5 | 13 |
| S3–S5 | 9 |
| S4–S5 | 3 |
| Use of preoperative embolism | |
| Yes | 12 |
| No | 14 |
| Surgical margin | |
| Intralesional | 4 |
| Marginal | 4 |
| Wide | 18 |
| Navigation error (mm) | 1.7 (1.3–1.9) |
| Age (years) | 55.8 (35.0–84.0) |
| Tumor transverse diameter (cm) | 7.1 (2.6–10.6) |
| Tumor maximum diameter (cm) | 11.6 (5.0–22.0) |
| Operative time (min) | 307 (140–495) |
| Estimated blood loss (ml) | 3065 (300–8500) |
| Volume of blood transfusion (ml) | 2720 (0–8000) |
Values are n or mean (range).