Research Article
Predictors of Recurrence and Patterns of Initial Failure in Localized Ewing Sarcoma: A Contemporary 20-Year Experience
Table 1
Patient, tumor, and treatment characteristics of localized Ewing sarcoma cohort.
| | | No relapse | Relapse |
| Number of patients | | 73 | 21 |
| Age at diagnosis | Median age | 15.8 years | 21.1 years | <10 y | 19 (26%) | 1 (5%) | 10–21 y | 24 (33%) | 9 (43%) | >21 y | 30 (41%) | 11 (52%) |
| Primary tumor site | Appendicular | 18 (25%) | 6 (29%) | Axial | 38 (52%) | 11 (52%) | Extraosseous | 17 (23%) | 4 (19%) |
| Primary tumor size | Median size | 6.4 cm | 8.5 cm | Mean size | 7.1 cm | 9.5 cm | ≤5 cm | 25 (34%) | 5 (24%) | 5.1–9.9 cm | 31 (42%) | 6 (29%) | ≥10 cm | 14 (19%) | 8 (38%) | Unknown | 3 (4%) | 2 (10%) |
| Definitive treatment | Surgery alone | 42 (58%) | 9 (43%) | RT alone | 13 (18%) | 5 (24%) | Surgery + RT | 18 (25%) | 7 (33%) |
| Percent necrosis | ≥95% | 27 (37%) | 2 (10%) | <95% | 14 (19%) | 10 (48%) | Unknown or N/A | 32 (44%) | 9 (43%) |
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