Medulloblastoma--treatment and prognosis. A study of seventeen cases in ten years.

In a series of 17 biopsy-proved cases of medulloblastoma all patients were treated by megavoltage irradiation in the Stanford University Division of Radiation Therapy. The entire craniospinal axis was treated in each case. The five-year survival in the series was 27 percent. Two ten-year survivors were studied in detail. The major longterm disability was inhibition of growth of the vertebral column. In this series, a normal tissue nominal standard dose of at least 1275 rets was necessary for tumor control.