Characteristics | Value | % | |
---|---|---|---|
Age (years) | |||
Median | 61 | ||
Range | 34–84 | ||
Gender (n) | |||
Female | 22 | 32.4 | |
Male | 46 | 67.6 | |
Resection status (n) | |||
Biopsy | 28 | 41.2 | |
R2 | 26 | 38.2 | |
R0/1 | 14 | 20.6 | |
Treatment (n) | |||
Primary | 52 | 76.5 | |
Recurrent | 16 | 23.5 | |
Most cranial level of tumor (n) | |||
L4/5 | 7 | 10.3 | |
S1 | 12 | 17.7 | |
S2 | 23 | 33.8 | |
S3 | 14 | 20.6 | |
S4 | 5 | 7.4 | |
S5 | 4 | 5.9 | |
Os coccygeum | 3 | 4.4 | |
GTV (ml) | |||
Median | 182 | ||
Range | 0–1727 | ||
CTV1 (ml) | |||
Median | 263 | ||
Range | 0–1743 | ||
CTV2 (ml) | |||
Median | 938 | ||
Range | 60–2577 | ||
PTV1 (ml) | |||
Median | 414 | ||
Range | 0–2325 | ||
PTV2 (ml) | |||
Median | 1109 | ||
Range | 84–3138 | ||
Radiation dose | ED2Gy | ||
Carbon ion only: | (α/β = 2) | ||
60 Gy/3 Gy (RBE) | 75.0 Gy | 16 | 23.5 |
63 Gy/3 Gy (RBE) | 78.8 Gy | 2 | 2.9 |
66 Gy/3 Gy (RBE) | 82.5 Gy | 14 | 20.6 |
64 Gy/4 Gy (RBE) | 96.0 Gy | 14 | 20.6 |
IMRT + carbon ion boost | |||
50 Gy/2 Gy + 15 Gy/3 Gy (RBE) | 68.8 Gy | 1 | 1.5 |
50 Gy/2 Gy + 18 Gy/3 Gy (RBE) | 74.5 Gy | 1 | 1.5 |
50 Gy/2 Gy + 24 Gy/3 Gy (RBE) | 80.0 Gy | 20 | 29.4 |