To address this, we generated xenografts in CB17‐SCID mice using the isogenic BRCA2+/+ (BRCA2‐proficient) and BRCA2−/− (BRCA2‐deficient) human colorectal adenocarcinoma DLD1 cells (Fig 1A and B). This evidence concerns the gene BRCA2 and colorectal adenocarcinoma.