Table A1.

Retrospective correlation of A-NB94 risk groups with INRG stratification.

A-NB94 Staging Criteria			Retrospective INRG Risk Classification
MYCN	Stage	Age	Low	Intermediate	High	n.e.	Total
amplified	1	≤12			1		1
		>12			1		1
	2	≤12
		>12
	3	≤12			1		1
		>12			4		4
	4	≤12			5		5
		>12			14		14
non-amplified	1	≤12	15				15
		>12	46				46
	2	≤12	9				9
		>12	10				10
	3	≤12	8			4	12
		>12	3	3		1	7
	4	≤12	4	1		1	6
		>12			17	1	18
	4S	≤12	4			6	10
heterogeneously amplified	1	≤12	1				1
		>12
	2	≤12	1				1
		>12
	3	≤12	1				1
		>12
	4	≤12				1	1
		>12
Total			102	4	43	14	163

Retrospective correlation of A-NB94 risk stratification with the International Neuroblastoma Risk Group (INRG) classification [2].