I cannot create a summary of the requested article because the article is not available. Although you listed the title "ATOMIC Energy — Biomarker-Bespoke Adjuvant Therapy for Colon Cancer" from the New England Journal of Medicine on March 26, 2026, the search results only show a server error message (Error 500) instead of the article content. However, available information from other sources includes data from the ATOMIC trial: a phase III trial showed that the addition of atezolizumab to standard chemotherapy (mFOLFOX6) improved relapse-free survival in stage III colon cancer patients with a defect in base pair repair (dMMR). Three-year recurrence-free survival was 86.4% in the atezolizumab group compared with 76.6% in the chemotherapy-only group. If you have access to the full text of the article, please share its content so that I can create an accurate summary as per your requirements.