EPCAM and cancer: Next, we used Pearson’s correlation coefficients to explore potential associations between stroma-restricted CD8+ T effector cells and IFNγ identified in lymphoid aggregates with the cancer stemness biomarker EpCAM and CD44v6 expression levels; significant R2 values were determined for CD8+ T effector cells or IFNγ versus EpCAM in tumors from deceased patients (Fig. 5C).