Table 3.

Event Details

Age (years)	% YST at Diagnosis*	AFP Level (IU/L)		Relapse Confirmed by	Time to Relapse (months)†	Survival
		Diagnosis	Relapse			Status	Survival Time (months)
Concordant-stage patients‡
2	2	9,610	153	AFP only	4	Alive	42.1
9	99	3,772	3,773	AFP only	7	Alive	79.6
13	100	497	39	Pelvic mass	5	Alive	35.8
13	60	17,285	915	Retroperitoneal mass	4	Alive	43.3
13	100	26,773	305	Pelvis and retroperitoneum	2	Alive	28.2
13	100	889	446	AFP only	4	Alive	23.4
15	99	44,115	792	Pelvis, liver, pleura	2	Alive	57.7
16	100	56,221	476	Para-aortic mass	1	Alive	29.1
16	50	494	998	Unknown site of mass	1	Dead	16.2
Discordant-stage patients‡
< 1	Unknown	156	327	Retroperitoneal mass	2	Alive	22.1
10	25	13,310	146	Liver	3	Alive	42.4
11	100	2,220,000	342	AFP only	2	Alive	27.9

Abbreviations: AFP, alpha-fetoprotein; YST, yolk sac tumor.

^*Percentage of the tumor that was YST at diagnosis.

^†Time to relapse defined as time from initial definitive surgery to first relapse.

^‡Concordant or discordant means that central review of stage by study surgeons was either concordant or discordant with stage determined by institution.