Supplementary Table 1.

Number of representative tissue cores used for the immunohistochemical analysis of the different antibodies

	Frequency	Percent	AURKA	AURKB	BUB1B	MAD2
Normal testis	21	5.9	21	21	21	21
IGCN	17	4.8	16	17	17	17
Seminoma	135	37.8	131	133	131	132
Embryonal Carcinoma	71	19.9	63	65	69	68
Yolk sac tumor	54	15.1	49	51	50	48
Teratoma	59	16.5	54	54	49	43
Total	357	100	334	341	337	329