postoperative high-voltage radiotherapy ( 31 patients , dosage 4,000 -- 6,000 rads ) and combined chemotherapy consisting of ccnu , vincristine , amethopterine , and procarbazine in 15-day circles ( comp protocol ) ( 12 patients ) showed the same median survival time of 10.6 months and comparable recurrence-free intervals of 6.8 and 7.0 months , respectively .
C0042679
vincristine
C0056167
comp protocol