Table 1.
Tumor characteristics.
| Characteristic | Number of tumors (%) | ||
|---|---|---|---|
| Total number of patients | 54 | ||
|
| |||
| Primary lesion | Histology | ||
|
| |||
| Lung | 46 (85) | Squamous | 10 (22) |
| Adeno | 28 (61) | ||
| Small | 4 (9) | ||
| Poorly differentiated | 1 (2) | ||
| Undifferentiated | 3 (6) | ||
|
| |||
| Liver | 1 (2) | Poorly differentiated | 1 |
|
| |||
| Unknown | 1 (2) | – | – |
| Colon | 1 (2) | Adeno | 1 |
|
| |||
| Breast | 4 (7) | Ductal | 3 (75) |
| Scirrhous | 1 (25) | ||
|
| |||
| Uterus cervix | 1 (2) | Squamous | 1 |
|
| |||
| Total number of metastases | 128 | ||
| Number of metastases, median (range) | 2 (1–8) | ||
| GTV (cc), median (range) | 1.9 (0.01–18) | ||
| PTV maximum (Gy), median (range) | 34 (28–39) | ||
| PTV minimum (Gy), median (range) | 27 (23–33) | ||
| HI, median (range) | 1.2 (1.0–1.4) | ||
Abbreviations: GTV, gross tumor volume; PTV, planning target volume; and HI, homogeneity index.