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Pembrolizumab versus placebo as adjuvant therapy in completely resected stage IIB or IIC melanoma (KEYNOTE-716): a randomised, double-blind, phase 3 trial.

Luke JL, Rutkowski P, Queirolo P, Del Vecchio M, Mackiewicz J, Chiarion-Sileni V et al on behalf of the KEYNOTE-716 Investigators.

Lancet 2022; 399: 1718-1729.

Adjuvant treatment with pembrolizumab every three weeks for up to 17 cycles was examined in the study that included 976 patients with median follow-up of 20.9 months. Treatment improved recurrence-free survival: 85 versus 76%, hazard ratio 0.61, 95 per cent confidence interval 0.45 to 0.82.

Comment: This difference is valuable, but again, it remains to be seen how late outcomes are affected.

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