A short fractionation radiotherapy treatment for poor prognosis patients with high grade glioma

Abstract

Thirty-two patients prospectively identified as having poor prognosis high grade glioma, with a MRC prognostic score >25, were treated with a short palliative course of radiotherapy. A total dose of 36 Gy in 12 fractions was given to the tumour, including oedema and a 2 cm margin, using parallel pair fields prescribed to the midplane with MV photons. Twenty-eight patients completed treatment as planned, while four failed to complete treatment because of clinical deterioration or death. The median survival for the whole group was 16 weeks, with seven patients surviving for more than 6 months. Approximately two-thirds of the surviving patients remained at home after the completion of treatment. A matched case-control comparison with data from patients in previous MRC studies who had received a 6-week course of treatment shows that, for this group of patients, survival is similar (hazard ratio 1.0; 95% confidence interval (CI) 0.57-1.74). The 95% CI for the difference in median survival time excludes a reduction of more than 7 weeks with the 36 Gy course. This shortened radiotherapy regimen may therefore be satisfactory for most poor prognosis patients. However, patients with performance status 3 gained little benefit from treatment, and it is suggested that this group should have a trial period of assessment at home prior to a decision on treatment.