My colorectal cancer report says dMMR. Does my family need screening?

China’s National Health Commission lists immunotherapy indications for certain patients with MSI-H or dMMR colorectal cancer. Ask whether your test identified missing mismatch repair proteins or high microsatellite instability. Bring the full pathology report and test results so the team can consider them alongside the cancer stage and previous treatment. National Health Commission guidance on anticancer medicines

China’s colorectal screening guidance sets out specific recommendations for people at high risk of Lynch syndrome and distinguishes risks associated with different genes. Ask your team what kind of report you already have and whether a separate hereditary assessment is warranted. Chinese colorectal cancer screening guidance

The Chinese screening guidance gives different starting ages for people at high risk of Lynch syndrome depending on the gene involved. Bring a list of relatives with cancer, the sites of those cancers and their ages at diagnosis. Ask whether you should see a genetic counsellor and whether the team can give you a written opinion to share with your clinician at home. Chinese colorectal cancer screening guidance

I only have a screenshot of my dMMR result. What should I bring to genetic counselling?

Get the complete pathology report and original mismatch repair or MSI test report. Note the types of cancer and ages at diagnosis in your family. The clinician can decide whether more tests are needed.