Conditions: Osteosarcoma Medulloblastoma Sarcoma, Ewing's Neuroblastoma (Measurable Disease) Neuroblastoma (Metaiodobenzylguanidine Positive Evaluable) Rhabdomyosarcoma Ependymoma Non-brainstem High-grade Glioma
Allocation: NON_RANDOMIZED | Intervention model: SINGLE_GROUP
Enrollment: 72
Healthy volunteers: no

Brief summary:
To determine the response rate of pemetrexed given every 21 days for the treatment of children with relapsed or refractory osteosarcoma, Ewing's sarcoma/peripheral primitive neuroectodermal tumors (PNET), rhabdomyosarcoma, neuroblastoma, ependymoma, medulloblastoma/supratentorial PNET or non-brain stem high-grade glioma.

Detailed description:

Arms:
arm 1: None

Interventions: intervention 1: pemetrexed
Intervention descriptions: intervention 1: 1910 milligrams per meter squared (mg/m\^2) (or 60 milligrams per kilogram \[mg/kg\] if patient \<12 months old), intravenous (IV), for 21 days x 17 cycles

Protocol document: