Since these cultures are a mix of tumor cells, mesothelial cells, fibroblasts and immune cells we performed adhesion based cell enrichments for tumor cells (EpCAM positive cells) and found that cells that rapidly adhere to plastic (few tumor cells) produce more DcR3 than the cells from the same sample that were allowed 24 h to attach (enriched for tumor cells, Figure 2C). Here, EPCAM is linked to neoplasm.