“…In a recent review of phase II and III trials, Kornblith [17] noted that many of these studies were reported as showing some advantage for the multidrug regimen over control series utilizing radiotherapy alone after surgery. Among the reported studies, in primary malignant gliomas after surgery and radiotherapy associated with supportive chemotherapy with nitrosoureas, given alone or in association with other drugs, it is interesting to note that the TTP was reported as 31 and 29 weeks [18,19], as 32 weeks [20] and as 39 weeks in a trial (EORTC group 83) in which however all cases were not GBM [14]. Unfortunately the trials are often not comparable because differently graded gliomas are mixed in the same list of patients.…”