YEATS4 promotes the progression of breast cancer. A. Percentage of positive YEATS4 expression in adjacent normal tissues (ANTs), ductal carcinoma in situ (DCIS), invasive carcinoma without lymph node metastasis (ICW), and invasive carcinoma with lymph node metastasis (ICLNM). B. Comparison of the median immunoreactive scores (IRSs) of YEATS4 staining among ANTs, DCIS, ICW, and ICLNM specimens. C. Representative images of YEATS4 staining of ANTs, DCIS, ICW, and ICLNM specimens. Scale bar, 50 µm for 200×; 20 µm for 400×. D. Median IRS being higher in invasive carcinoma than in DCIS under the same ER status. E. Percentage of positive YEATS4 expression at different TNM stages. F. Comparison of median IRS of YEATS4 staining among stages I, II, and III. G. Representative YEATS4 images at stages I, II, and III. Scale bar, 50 µm for 200×; 20 µm for 400×.