RecruitingPhase 2Drug trialPhase II Study of Irinotecan Liposome (II) Combined With Temozolomide and Fluzoparib in Recurrent or Metastatic Ewing SarcomaThe current study is an investigator-initiated, single-arm phase 2 study that enrolled patients with recurrent and/or metastatic Ewing sarcoma for the treatment of Irinotecan Liposome (II) Combined with Temozolomide and Fluzoparib as the second-line treatment.