KRT20 and malignant colon neoplasm: To investigate this hypothesis, we measured the levels of PHGR1 mRNA in parallel with the mRNA levels of the established lymph node metastasis marker KRT20 in tumors from colon, pancreas, breast, prostate and lung (non-small cell) cancer patients, as well as normal lymph nodes and lymph nodes with known colon cancer metastases (Fig. 6a and b).