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| Skeletal ES/PNET | Extraskeletal ES/PNET | |
|---|---|---|
| Incidence | 80-85% | 15-20% |
| Organs involved | Bone and deep soft tissues | Pancreas, kidneys, stomach, small bowel, esophagus, ovaries and vagina |
| M/F ratio | 1.5:1 | 1:1 |
| Average age at presentation | 15 years old | 20 years old |
ES: Ewing sarcoma; PNET: primitive neuroectodermal tumor; M: male; F: female.
