Sara Lonardi, MD, Veneto Institute of Oncology, Padua, Italy, discusses the approach to deficient mismatch repair/microsatellite instability-high (dMMR/MSI-H) metastatic colorectal cancer (mCRC) patients who progress on first-line immunotherapy (IO) doublet therapy, highlighting that while a significant proportion of patients experience long progression-free survival, those who do progress have various salvage options, including standard chemotherapy, encorafenib and cetuximab for BRAF-mutated tumors, and potentially other immunotherapeutic strategies. Dr Lonardi notes that the choice of subsequent treatment depends on several factors, including the presence of specific mutations such as BRAF. This interview took place at the European Society for Medical Oncology (ESMO) 2026 Congress in Madrid, Spain.
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