On comparing gene expression in residual cancer cells, eight genes (S100A9, S100A7, CHI3L1, SLPI, SERPINA3, CASP14, URI1, and AZGP1) were found to be significantly upregulated, and 17 (ACTA2, IGFBP4, BGN, TPM2, MYLK, MMP7, HLA-DPB1, CRISPLD1, COL1A2, OLFM4, KRT14, HLA-DPA1, COL1A1, COL3A1, IFI6, IFI27, and A2M) were significantly downregulated in patients with recurrence. This evidence concerns the gene COL1A2 and cancer.