4.1.1
There has been only 1 randomised controlled trial (RCT) of 225 patients involving temozolomide versus procarbazine alone in patients with recurrent glioblastoma multiforme (GBM). There are no trials of temozolomide in anaplastic astrocytoma (AA). All patients in the GBM trial had received radiotherapy and two‑thirds had also received first‑line nitrosourea‑based chemotherapy. Patients were required to have a histologically proven supratentorial GBM or gliosarcoma at first relapse, recurrence or progression (as assessed by imaging), Karnofsky performance status of 70 or more and a projected life expectancy of 12 weeks or more at entry.