Medulloblastoma in children

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Abstract
Treatment and results in 45 cases of medulloblastoma arising in childhood were reviewed. The surgical mortality rate was 11%. Of those completing postoperative cerebrospinal irradiation, 53% survived for 3 yr, 41% for 5 yr and 22% for 10 yr. The extent of surgical resection of the cerebellar tumor had no significant bearing on the prognosis. Those cases remaining free of recurrent disease received higher doses of postoperative irradiation, approaching 5000 rads to the whole brain or posterior fossa and 4000 rads to the spinal axis. Repeat irradiation and chemotherapy (vincristine, the nitrosoureas and methotrexate) provided good palliation in most cases and significantly extended survival time. Twenty-eight of 29 patients who developed locally recurrent or metastatic disease died. Vincristine was considered the chemotherapeutic drug of choice and in 14 cases its use was associated with remissions lasting 2-18 mo. The combination of chemotherapy and repeat irradiation was followed by remissions of longer duration compared to retreatment by irradiation alone when the disease recurred within 2 yr. The inherent value of ventricular shunting procedures and steroid therapy for recurrent intracranial disease could not be ascertained. The findings in this study suggest that the primary treatment of medulloblastoma should be extended to include chemotherapy and optimum radiation therapy, since once recurrent disease develops retreatment is essentially palliative and a fatal outcome is certain.