Table 1 Patient characteristics
Characteristics | No. of patients (%) |
|---|---|
Age, years | |
Median | 53 |
Range | 32–72 |
KPS | |
80 | 7 (28.0%) |
90 | 14 (56.0%) |
100 | 4 (16.0%) |
Gender | |
Male | 19 (76.0%) |
Female | 6 (24.0%) |
Primary tumor operation | |
abdominoperineal excision | 13 (52.0%) |
low anterior resection | 10 (40.0%) |
Hartmann’s resection | 2 (8.0%) |
Prior pelvic radiation therapy | |
Yes | 17 (68.0%) |
No | 8 (32.0%) |
Dose of prior pelvic radiation therapy | |
Median | 50Gy |
Range | 27-60Gy |
Tumor sites | |
presacral | 11 (44.0%) |
side wall | 9 (36.0%) |
perineal | 4 (16.0%) |
perianastomosis | 1 (4.0%) |
Tumor size | |
range | 6.1–334.1 (ml) |
average | 84.5 (ml) |
Total Dose of Carbon Ion | |
< 66Gy (RBE) | 9 (36.0%) |
≥ 66Gy (RBE) | 16 (64.0%) |