Table 1.
Patients and tumor characteristics
| Initial characteristics | Numbers of patients 61 cases | % |
|---|---|---|
| Median age (ranges) | 13 years (4–24) | |
| Male | 38 | |
| Female | 23 | |
| Primary | ||
| Limbs | 42 | 69 |
| Trunk | 12 | 20 |
| Head and neck | 7 | 11 |
| Tumor size (>5 cm) | 28 | 46 |
| TNM | ||
| T1 | 51 | 83 |
| T2 | 9 | 15 |
| Unknown | 1 | 2 |
| IRS groups | ||
| IRS‐I | 22 | 36 |
| IRS‐II | 13 | 21 |
| IRS‐III | 26 | 43 |
| Risk group | ||
| Low risk | 13 | 21 |
| Intermediate risk | 10 | 17 |
| High risk | 38 | 62 |
| Histology subtypes | ||
| Monophasic | 46 | 76 |
| Biphasic | 13 | 21 |
| Unknown | 2 | 3 |
| FNCLCC grading | ||
| Grade 2 | 41 | 67 |
| Grade 3 | 11 | 18 |
| Unknown | 9 | 15 |
| Transcript | ||
| SSX1 | 30 | 49 |
| SSX2 | 9 | 15 |
| One of both | 19 | 32 |
| Negative | 1 | 1 |
| Not performed | 2 | 3 |
| Genomic index | ||
| Low | 34 | 56 |
| High | 27 | 44 |
FNCLCC, Federation Nationale des Centres de LutteContre le Cancer;IRS I, complete resection; IRS I, microscopic residue; IRS III, macroscopic residue; R0, complete delayed surgery; R1, microscopic incomplete delayed surgery; R2, macroscopic incomplete delayed surgery. T1, tumor localized in the organ or origin; T2, tumor extend beyond organ or tissue of origin.