Table 2 Backgrounds of the tumors
| Â | 1st-20 sets | 2nd-20 sets | 3rd-20 sets | 4th-20 sets |
|---|---|---|---|---|
Side (right/left) | 8/12 | 9/11 | 11/9 | 14/6 |
Maximum length on CT (cm) | 4.8 ± 2.6 | 3.8 ± 1.3 | 4.7 ± 2.3 | 5.0 ± 2.3 |
Ventral/Dorsal | 15/5 | 10/10 | 9/11 | 12/8 |
Upper/Lower | 16/4 | 10/10 | 11/9 | 15/5 |