Vincristine, etoposide, carboplatin, and cyclophosphamide have been used in many protocols for brain tumors but the result was very poor in refractory or relapsed cases. However, irinotecan can be effective with these multiple chemotherapeutic agents. According to the pilot study of irinotecan in combination with vincristine, etoposide, carboplatin and cyclophosphamide in the investigators center, 75% percent of total 12 patients reached more than stable disease, and 2 patients got long term complete remission only with this multi-agent combination chemotherapy. But the combination of irinotecan, vincristine, etoposide, carboplatin, and cyclophosphamide is not clinically studied yet especially for pediatric patients. To improve response rate and progression-free survival, the combination chemotherapy of irinotecan, vincristine, etoposide, carboplatin, and cyclophosphamide is designed for pediatric refractory or relapsed brain tumor.