METN375S was associated with significantly shorter relapse-free survival (RFS) in SCC of the head and neck (HNSCC; P = 0.005) and lung (LUSC; P = 0.029)....Two patients with refractory HNSCC who completed 1 cycle of afatinib, a pan-HER inhibitor, showed radiological tumour shrinkage and reduction in metabolic activity, with partial response by RECIST 1.1 measurement observed in one patient.