In addition, three genes common to both patients which carried bivalent marks in normal and lost H3K4me3 in tumor, LHX9, PKNOX2 and LBXCOR1 and one, PRDM8, lost the H3K27me3 in tumor, all of which are transcription factors with unknown function in colon. This evidence concerns the gene PKNOX2 and neoplasm.