Colon cancer with matched colon tissue array, including pathology grade,with MMR MLH1/PMS2/MSH2/MSH6 IHC results, TNM and clinical stage, containing 90 cases of adenocarcinoma, and 90 cancer adjacent or adjacent normal colon tissue, 90 cases/180 cores, replacing CO1801, trial slide Tissue microarray trial slide, 10% size: 25% of cores missing, not fresh cut, for testing IHC conditions only