The aim of the current study was to investigate the prevalence and the type of 9p24.1 alterations in severely the pretreated population of r/r cHL patients receiving nivolumab (nivo)...for 9p24.1 amplification, a 3-year PFS was 20% (95% CI 3.1- 47%) with median of 20.6 months (95% CI 6.6-35.6)...