Pembrolizumab (Keytruda), an anti-PD-1 antibody, cleared minimal residual disease and protected against recurrence in patients with DNA mismatch repair-deficient (dMMR) early-stage solid cancers who had detectable circulating tumor DNA (ctDNA) after resection, according to preliminary results from a phase II trial presented at the American Association for Cancer Research (AACR) Annual Meeting 2025, held April 25–30.
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