RecruitingPhase 2Drug trialDoxorubicin Hydrochloride Liposome Combined With Irinotecan (AI Regimen) Versus VIT Regimen in the Treatment of Relapsed and Refractory Pediatric Rhabdomyosarcoma: a Prospective, Open-label, Randomized Controlled, Multicenter, Phase II Clinical StudyThis multicenter, randomized, controlled, open-label, prospective clinical trial was designed to evaluate the efficacy and safety of doxorubicin hydrochloride liposome injection in combination with irinotican (AI regimen) versus VIT regimen in the treatment of relapsed and refractory pediatric rhabdomyosarcoma.