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Here is a large phase-III well done study confirming what we knew from earlier studies, that ipilimumab plus nivolumab (Ipi+Nivo) is highly active and effective in the microsatellite instability-high metastatic colorectal cancer (MSI-high met-CRC) population. This is most likely more effective than single agent IO therapy but with higher rates of toxicity. When all things are equal, I would consider this to be the standard of care (SOC) in this context.

This Japanese study showed no benefit with the addition of oxaliplatin to fluoropyrimidine plus bevacizumab (5FU+bev) in patients who were aged 70-74 but unfit, or >=75. Interestingly survival was actually shorter in the patients who received oxaliplatin at 21.3 vs 19.7 months.

Overall survival (OS) improvement was not statistically significant in the study arm but is a non-chemotherapy option. Patients here had tumors with MSS.

Less maintenance is NOT NON-inferior, so it is inferior in patients with wild type BRAF metastatic colon cancer. So it is better to keep on the full regimen. Although, quality of life is better.

Colorectal cancer screening by peripheral blood testing? This cell-free DNA assay had an 83% sensitivity and 90% specificity for advanced neoplasia. However, the issue is that this does not detect precancerous lesions well. Colonoscopy has its obvious advantages as it can both diagnose colorectal cancer as well as eradicate precancerous lesions.

If anti PD-L1 was not used as first line treatment, this study shows you can still use it as second line.

In this study, Cetuximab beat Bevacizumab in left sided KRAS wild type colon cancer.