Research Article
Factors Influencing the Outcome of Patients with Primary Ewing Sarcoma of the Sacrum
Table 1
Descriptive statistics of the patient collective.
| Patient characteristics | N (total N = 124) | % |
| Age | <18 | 78 | 62.9 | ≥18 | 46 | 37.1 |
| Gender | Male | 79 | 63.7 | Female | 45 | 36.3 |
| Tumor volume | <200 mL | 64 | 51.6 | ≥200 mL | 41 | 33.1 | Unknown | 19 | 15.3 |
| Metastases at diagnosis | Yes | 53 | 42.7 | No | 70 | Unknown | 1 | Pulmonary | 35 | 57.3 | Extrapulmonary | 17 |
| Local therapy | No local therapy | 7 | 5.6 | Surgery only | 5 | 4 | Radiotherapy only | 74 | 59.7 | Surgery + radiotherapy | 29 | 23.4 | Unknown | 9 | 7.3 |
| Study protocol | GPOH EE99 | 69 | 55.6 | EWING 2008 | 55 | 44.4 |
| Affected sacral levels | S1 and higher | 16 | 12.9 | S2 and lower | 32 | 25.8 | Unknown | 76 | 61.3 |
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