Figure 4.

HPV DNA tracking in the validation cohort with HPV16-detect assay. HPV DNA levels decreased below threshold at 12-weeks post-treatment (n=10, A). Red plots in (A) highlight the three patients in (B–D) with residual lymph node disease on ¹⁸F-FDG PET-CT, negative ND specimens and below threshold levels of HPV DNA in the plasma taken at the time ND. PA=post-assessment; post-IC=post-induction chemotherapy; Post-1 week=post-5 fractions of radiotherapy. A full colour version of this figure is available at British Journal of Cancer journal online.