RecruitingPhase 2Drug trialIrinotecan Liposome Combined with S-1 in PD-1/L1 Inhibitor Refractory Recurrent or Metastatic NPCThis is a prospective, single-arm Phase 2 study to evaluate the efficacy and safety of Irinotecan Liposome injection combined with S-1 in patients with recurrent (unable to local curative treatment) or metastatic NPC who failed at least first-line anti-PD-1/L1.