showed a trendP value = 0.08
This showed a trend for increased maintenance of expanded pre-existing clones in responders ( P value = 0.08). 56 In other tumour types, Valpione et al. analysed pre-treatment biopsies from 20 patients with metastatic melanoma undergoing anti-PD-1 treatment. 57 They found higher TCR clonality pre-treatment in patients responding to ICB.