Eligible patients had biopsy-proven cHL treated with ABVD or equivalent regimens….The 20-year FFP for patients whose tumors were aC3high/BCL2neg, either aC3low or BCL2pos, and aC3low/BCL2pos was 91% vs 84% vs 60% (p<0.0001)....The combination aC3low/BCL2pos defined a sizeable (~43% of patients) subgroup of advanced cHL with very poor outcome reflected by PFS<50%.