ERBB2 and breast cancer: To further validate the association between SRGN and TGFβ2 protein expression in breast cancer patients, we detected the SRGN and TGFβ2 protein expression in 320 non-TNBC tumor tissues (110 Luminal A, 108 Luminal B, and 102 HER2) and 106 TNBC tumor tissues by immunohistochemical staining.