Expression of EpiSC gene patterns in EECs, especially late ones. (A) Relationships between normal endometrium, EECs of different stages in the training data set and epithelial stem cells (EpiSCs). This MDS plot was drawn by the 217 features differentiating early and late EECs. (B) Average linkage distances between tissues and EpiSCs. The same 217 probe sets were used. The confidence limits shown represent the standard error. (C) A heat map shows genes overexpressed in both EpiSCs and late EECs. Gene symbols of these genes are shown. Genes associate with tumor malignancy or stem cell biology are underlined. (D) A heat map shows the distribution patterns of the 77 probe sets down-regulated in late EECs. These genes are also absence in EpiSCs.