Table 2. The number of hyper- and hypomethylated genes in comparison with non-neoplastic kidney.

	CpG island probe
	Hypermethylated	Hypomethylated
CCSK	490 probes (437 genes)	46 probes (36 genes)
RTK	130 probes (107 genes)	65 probes (62 genes)
ESFT	66 probes (58 genes)	55 probes (46 genes)
	Non-CpG island probe
	Hypermethylated	Hypomethylated
CCSK	184 probes (166 genes)	117probes (112 genes)
RTK	179 probes (160 genes)	320probes (275 genes)
ESFT	113 probes (101 genes)	136probes (124 genes)

Hypermethylation: difference of average β-value >0.3. Hypomethylation: difference of average β-value<−0.3.