Molecular fingerprint of EEC subtypes. A heat map shows the 217 probes sets differentiating early and late EECs in the training data set, as well as discriminating normal endometrium and tumor tissues. Columns represent tumor samples; rows represent probe sets. In red, increased; in blue, decreased. Arrows indicates two early EECs which express a late EEC gene signature (black, Stage 1B; red, Stage 2B).