2.1
Pembrolizumab (Keytruda, Merck Sharp & Dohme) has a UK marketing authorisation as monotherapy or with platinum and 5-fluorouracil (5-FU) chemotherapy 'for the first-line treatment of metastatic or unresectable recurrent head and neck squamous cell carcinoma (HNSCC) in adults whose tumours express PD-L1 with a CPS [combined positive score] ≥ 1'.