It was shown in the experimental part of the results concerning the oligonucleotide microarray analysis that as far as genes differentiating stages I–IV of clinical and pathological cancer progression from the reference are concerned, transcripts of the encoding genes AKT 1, STAT3, Mcl-1, VEGFC, and CCND1 are expressed in cancer-affected tissues, whereas the STAT5B and VEGFA protein is silenced. This evidence concerns the gene STAT5B and cancer.