Table 2. Clinicopathological characteristics of study cohort.

Age at first biopsy (yrs, N = 95)
Mean (Range)	3.54 (0.02–10.94)
Gender (N = 95)
Male	60
Female	35
Sample type (N = 118)
Pre-treatment primary tumors	36
Post-treatment primary tumors	53
Relapsed/metastatic tumors	26
Treatment status unknown	3
Histology (N = 118)
Neuroblastoma	67
Ganglioneuroblastoma	16
Ganglioneuroma	3
Neuroblastic tumor, unspecified	32
MYCN amplification status (N = 108)
Amplified	26
Non-amplified	81
Equivocal	1