Pokemon expression in breast cancer tissues and its relationship with patient survival. (A) Immunohistochemistry indicating Pokemon expression in normal and malignant breast tissues. Results were scored by a researcher blinded to the samples and by a pathologist. The images show Pokemon expression in (a) normal breast lobules and in breast cancers scored as (b) 1, (c) 2 and (d) 3, respectively. (B) Kaplan-Meier plots of (i) overall survival (n = 175, P = 0.01) and (ii) disease-related survival (n = 79, P = 0.0134). Data are from the Yale Tissue Microarray (YTMA)-23 microarray containing 175 breast cancer cases with clinical data and more than 30 years of follow-up. In disease-related survival plots, disease-free survival or patients who died as a result of breast cancer are included.