Table 1

Summary of the methylation analysis

CaseMethylation
5 breast cancer cell lines5 (100%)
 (MCF7, MDAMB157, MDAMB231, T47D, and ZR75-1)
45 primary breast tumors28 (62%)
41 ductal carcinomas26 (63%)
2 lobular carcinomas1 (50%)
1 colloid carcinomaMethylated
1 phyllodes cystosarcomaUnmethylated
3 grade I3 (100%)
15 grade II8 (53%)
15 grade III9 (60%)
12 grade unknown8 (67%)
40 matching normal tissues3 (7.5%)