Adavosertib and Irinotecan Hydrochloride in Treating Younger Patients With Relapsed or Refractory Solid Tumors

central nervous system embryonal tumor with rhabdoid features, central nervous system embryonal tumor, not otherwise specified, central nervous system ganglioneuroblastoma, embryonal tumor with multilayered rosettes, c19mc-altered, pineoblastoma, primary central nervous system neoplasm, recurrent childhood central nervous system embryonal neoplasm, recurrent malignant solid neoplasm, recurrent medulloblastoma, recurrent neuroblastoma, recurrent rhabdomyosarcoma, refractory malignant solid neoplasm