Patient Characteristics at Diagnosis
| Characteristic | n |
| Total patients* | 280 |
| Sex | |
| Male | 165 (59) |
| Female | 115 (41) |
| Age < 18 mo | 31 (11) |
| Age > 18 mo | 249 (89) |
| Disease site† | |
| Bone only | 0 (0) |
| Bone marrow only | 2 (1) |
| Soft tissue only | 49 (18) |
| Bone and bone marrow | 3 (1) |
| Bone and soft tissue | 22 (8) |
| Bone marrow and soft tissue | 29 (10) |
| Bone, bone marrow, and soft tissue | 174 (62) |
| Unknown | 1 |
| MYCN status | |
| Amplified | 85 (38) |
| Nonamplified | 140 (62) |
| Unknown | 55 |
| Tumor histology | |
| Favorable | 6 (3) |
| Unfavorable | 188 (97) |
| Unknown | 86 |
| Ploidy | |
| Hyperdiploid | 103 (47) |
| Diploid | 116 (53) |
| Unknown | 61 |
| mIBG scans scored | |
| Diagnosis | 280 |
| After induction | 237 |
| After ASCT | 178 |
↵* Includes only patients with mIBG-avid disease (n = 280) present at diagnosis.
↵† Indicates sites of disease at diagnosis, as determined by radiographic studies (CT/MRI, mIBG scanning), soft-tissue biopsy or bone marrow aspirate/biopsy.
Data in parentheses are percentages. Median age was 3.1 y, and age range was 0.6–29 y.