Table 1. Patient and Tumor Characteristics.
| Characteristics | n (%) | P | ||
|---|---|---|---|---|
|
| ||||
| All Patients (n=37) | No RT to a Metastatic Site (n=24) | RT to a Metastatic Site (n=13) | ||
| Age at diagnosis (years) | ||||
| Median | 3.7 | 3.5 | 3.7 | 0.43 |
| Range | 0.7-20.7 | 0.8-10.7 | 0.7-20.7 | |
| Sex | ||||
| Male | 20 (54) | 13 (54) | 7 (54) | 0.98 |
| Female | 17 (46) | 11 (46) | 6 (46) | |
| Resection extent | ||||
| GTR/NTR | 26 (70) | 18 (75) | 8 (61) | 0.47 |
| STR | 11 (30) | 6 (25) | 5 (39) | |
| Shimada histology | ||||
| Favorable | 4 (11) | 2 (11) | 2 (17) | 0.63 |
| Unfavorable | 27 (73) | 17 (89) | 10 (83) | |
| Unknown | 6 (16) | |||
| N-myc amplification | ||||
| Yes | 12 (32) | 9 (56) | 3 (30) | 0.25 |
| No | 14 (38) | 7 (44) | 7 (70) | |
| Unknown | 11 (27) | |||
| Transplant | ||||
| Single | 6 (16) | 4 (17) | 2 (15) | 1.00 |
| Tandem | 31 (84) | 20 (83) | 11 (85) | |
| Maintenance cis-retinoic acid | ||||
| Completed full course | ||||
| Yes | 33 (89) | 20 (91) | 13 (100) | 0.52 |
| No | 2 (5) | 2 (9) | 0 (0) | |
| Unknown | 2 (5) | |||
| Primary antibody treatment | ||||
| Yes | 5 (14) | 4 (17) | 1 (8) | 1.00 |
| No | 32 (86) | 20 (83) | 12 (92) | |
| No. metastatic sites involved at diagnosis | ||||
| Median | 4 | 4 | 5 | 0.75 |
| Range | 1-12 | 1-12 | 1-12 | |
GTR indicates gross total resection; NTR, near-total resection; RT, radiation therapy; STR, subtotal resection.