Table 2.
Clinical presenting features of patients with Ewing sarcoma and PNET (n=3575).
| Ewing sarcoma (N = 2945) | PNET (N = 630) | p value | |
|---|---|---|---|
| N % | N % | ||
| Metastasis at diagnosis | |||
| Yes | 323 (24.7) | 74 (24.4) | 0.941 |
| No | 984 (75.3) | 229 (75.6) | |
| Unknown | 1638 | 327 | |
|
| |||
| Maximum tumor dimension | |||
| <8 cm | 225 (51.2) | 137 (51.7) | 0.891 |
| ≥8 cm | 493 (48.8) | 128 (48.3) | |
| Unknown | 2227 | 375 | |
|
| |||
| Grade | |||
| Well, moderately, or poorly diff. | 225 (31.3) | 60 (35.5) | 0.314 |
| Undifferentiated | 493 (68.7) | 109 (64.5) | |
| Unknown | 2227 | 461 | |
|
| |||
| Primary site bone | |||
| Yes | 2065 (70.1) | 354 (56.2) | 0.001 |
| No | 880 (29.9) | 276 (43.8) | |
|
| |||
| Primary site bone, axial∗ | |||
| Yes | 371 (18.0) | 15 (4.2) | 0.001 |
| No | 1694 (82.0) | 339 (95.8) | |
|
| |||
| Primary site bone, pelvis∗ | |||
| Yes | 446 (21.6) | 20 (5.7) | 0.001 |
| No | 1619 (78.4) | 334 (94.3) | |
∗Among patients with bone primary tumors (n=2065 for ES; n=354 for PNET).