EPCAM and digestive system neoplasm: As shown in Figure 1, the LN-229 (mHsp70: 80 ± 4%), U-87 (mHsp70: 96 ± 4%) brain, and MIA PaCa-2 (mHsp70: 97 ± 3%) pancreas tumor cells are only positive for mHsp70, but negative for EpCAM.