Next, we studied intratumoural immune infiltrate in CRCs and ECs of defined MMR status and found that while dMMR was associated with increased density of tumour‐infiltrating CD3+ and CD8+ T‐cells in both cancer types, the increases were substantially greater in CRC and significant only in this group (PINT = 4.3e‐04 and 7.3e‐03, respectively). The gene discussed is CD8A; the disease is cancer.