The expression of KLF2 showed a significant upregulation in Invasive Breast Carcinoma Stroma, Invasive Ductal Breast Carcinoma Epithelia, Ductal Breast Carcinoma in Situ Epitheli, while other 13 dataset displayed an obvious downregulation across different subtypes. The gene discussed is KLF2; the disease is breast ductal adenocarcinoma.