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| Characteristic | No. of patients (%) |
|---|---|
| Sex | |
| Male | 27 (39.7) |
| Female | 41 (60.3) |
| Age at diagnosis | |
| <12 months | 42 (61.8) |
| ⩾12 months | 26 (38.2) |
| Stage | |
| 1 | 24 (35.3) |
| 2 | 11 (16.2) |
| 3 | 11 (16.2) |
| 4 | 18 (26.5) |
| 4S | 4 (5.9) |
| MYCN | |
| Non-amplified | 56 (82.4) |
| Amplified | 12 (17.6) |
| Diagnosis | |
| GNB | 7 (10.3) |
| NB | 61 (89.7) |
| Serum RASSF1A | |
| Unmethylated | 51 (75.0) |
| Methylated | 17 (25.0) |
