FDA approves Keytruda for cutaneous squamous cell carcinoma

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Keytruda was approved by FDA for patients with recurrent or metastatic cutaneous squamous cell carcinoma that is not curable by surgery or radiation.

Keytruda is sponsored by Merck.

Efficacy was investigated in KEYNOTE-629 (NCT03284424), a multicenter, multi-cohort, non-randomized, open-label trial. The trial excluded patients who had previously received therapy with an anti-PD-1, anti-PD-L1, or anti-CTLA-4 antibody and those with autoimmune disease or a medical condition that required immunosuppression. Patients received pembrolizumab 200 mg intravenously every 3 weeks until disease progression, unacceptable toxicity, or a maximum of 24 months. Assessment of tumor status was performed every 6 weeks during the first year and every 9 weeks during the second year.

The major efficacy outcome measures were objective response rate and response duration as assessed by blinded independent central review according to RECIST 1.1, modified to follow a maximum of 10 target lesions and a maximum of 5 target lesions per organ. The ORR was 34% (95% CI: 24, 44) and median response duration was not reached (range: 2.7, 13.1+ months)

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