Comparison of AVD + Low-Dose Nivolumab vs. PET-Adapted BEACOPP-like in Advanced cHL

Patients in this prospective multicenter phase II study will be randomized between two first-line therapy strategies for advanced stages of cHL. In the Nivo-AVD cohort, patients will receive 2 cycles of nivolumab monotherapy followed by a switch to Nivo-AVD combination therapy (total of 6 cycles); in the Standard cohort, patients will receive therapy according to current clinical guidelines in Russian Federation for first-line therapy of cHL, which include starting first-line therapy with 2 cycles of BEACOPP-like regimens and, after assessing response after 2 courses, switching to A(B)VD or continuing with BEACOPP-like regimens