NCT02452554 2022-01-13Lorvotuzumab Mertansine in Treating Younger Patients With Relapsed or Refractory Wilms Tumor, Rhabdomyosarcoma, Neuroblastoma, Pleuropulmonary Blastoma, Malignant Peripheral Nerve Sheath Tumor, or Synovial SarcomaChildren's Oncology GroupPhase 2 Completed62 enrolled 15 charts