Although HSP70 showed lower expression in GILM2 cells compared with GI101A cells in the gene array results, the tissue microarrays of breast cancer patients showed a strong association between high HSP70 expression and tumor aggression, i.e., lymph node metastases (p = 0.0002) and survival (p = 0.05) [100]. This evidence concerns the gene HSPA1A and breast cancer.