Variable Characteristic Tandem (n (%))
Number of patients 80
Sex Female 36 (45.0%)
Male 44 (55.0%)
Age (median, range), in years 3.5 (0.87,17.39)
Tumor MYCN status Amplified 29 (42.6%)
Nonamplified 39 (57.4%)
Unknown 12
Tumor Histology Favorable 1 (1.3%)
Unfavorable 74 (98.7%)
Unknown 5
Tumor Cell Ploidy Hyperdiploid 32 (52.5%)
Diploid 29 (47.5%)
Unknown 19
Immunotherapy Immunotherapy 56 (70.0%)
No immunotherapy 24 (30.0%)
EOI Response Complete or very good partial response 33 (41.2%)
Partial response 37 (46.3%)
No or mixed response 10 (12.5%)