Table I.
Characteristics of STS patients in different historic subtypes
| Age at diagnosis | All pediatric (0–19 yrs) | ||||
|---|---|---|---|---|---|
|
| |||||
| Histology | N | Median (years) | Range | N | % |
| Rhabdomyosarcoma | 2831 | 15 | 0 to 85+ | 1668 | 58.9 |
| Fibroblastic & myofibroblastic tumors | 3037 | 54 | 0 to 85+ | 286 | 9.4 |
| Fibrohistiocytic tumors | 14599 | 57 | 0 to 85+ | 547 | 3.7 |
| Malignant peripheral nerve sheath tumors | 2186 | 46 | 0 to 85+ | 217 | 9.9 |
| Kaposi sarcoma | 15241 | 39 | 0 to 85+ | 15 | 0.1 |
| Ewing family tumors | 589 | 24 | 0 to 85+ | 233 | 39.6 |
| Extrarenal rhabdoid tumor | 109 | 39.5 | 0 to 85+ | 44 | 40.4 |
| Liposarcomas | 7419 | 60 | 1 to 85+ | 87 | 1.2 |
| Leiomyosarcomas | 13135 | 59 | 0 to 85+ | 112 | 0.9 |
| Synovial sarcomas | 1859 | 35 | 0 to 85+ | 328 | 17.6 |
| Blood vessel tumors | 2742 | 65 | 0 to 85+ | 57 | 2.1 |
| Osseous and chondromatous neoplasms of soft tissue | 680 | 55 | 0 to 85+ | 26 | 3.8 |
| Alveolar soft parts sarcoma | 164 | 25 | 0 to 84 | 47 | 28.7 |
| Miscellaneous/unspecified including other fibromatous neoplasms | 8381 | 61 | 0 to 85+ | 480 | 5.7 |