EPCAM and neoplasm: Three clinical samples of malignant peritoneal ascites containing EpCAM‐positive tumour cells and primary fibroblasts (as control, non‐EpCAM‐expressing cells) were expanded ex vivo and the mixed primary cell populations were incubated with PBMC‐derived T cells and treated with free BiTE or 100 vp/cell EnAd‐EpCAMBiTE in culture medium.