Vinorelbine in Treating Children With Recurrent or Refractory Cancers

brain and central nervous system tumors, neuroblastoma, sarcoma, recurrent childhood rhabdomyosarcoma, recurrent neuroblastoma, recurrent childhood soft tissue sarcoma, recurrent childhood supratentorial primitive neuroectodermal tumor, recurrent childhood cerebellar astrocytoma, recurrent childhood cerebral astrocytoma, recurrent ewing sarcoma/peripheral primitive neuroectodermal tumor, recurrent childhood ependymoma, interventional