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- W2076397329 abstract "Oligodendroglioma is a rare central nervous system tumor which may occur in pure or mixed histology. This scarcity results in difficulty in defining optimal management, mainly due to a lack of outcome analysis. Results are further complicated because the reported series include patients treated before megavoltage radiation or computed tomographic (CT) scan development. This makes extrapolation of outcome difficult to apply to modern-era patients. We report results obtained by current treatment and evaluation.Outcome of all 38 patients (age 5-70 years) pathologically diagnosed between 1975 and 1993 were reviewed. Pure lesions were seen in 14 cases, of which three were anaplastic. The remainder had mixed tumors, of which six contained anaplastic astrocytic elements. Each patient had undergone maximal debulking surgery, but all remained with residual disease on postoperative CT.For nonanaplastic lesions, no local failure was seen in any patient receiving postoperative radiation (60 Gy) and chemotherapy (vincristine, procarbazine, and carmustine). Follow-up ranged from 28 to 240 months (median 125; N = 6). No postoperative therapy or chemotherapy alone resulted in local failure in all nine patients at risk [time to failure (TTF): 2-40 months; median 25]. Radiation alone in doses of 50 Gy at 2 Gy per day resulted in all six patients failing (TTF: 12-52 months; median 36). Achieving 60 Gy at 2 Gy a day allowed five of eight patients to remain disease free (disease-free survival: 24-160 months; median 66), with three failing at 26, 40, and 60 months. All lesions containing anaplastic elements underwent postoperative radiation therapy (60 Gy) and chemotherapy, with five of nine patients alive and well (median disease-free survival: 48 months; range 28-120).The combination of radiation and chemotherapy increases local control of oligodendroglioma whether they contain pure, mixed, or anaplastic histology. Radiation alone may offer good local control as long as 60 Gy is delivered. Chemotherapy alone appears to delay TTF and may be useful for pediatric patients." @default.
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- W2076397329 date "1997-01-01" @default.
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- W2076397329 title "Radiation and chemotherapy improve outcome in oligodendroglioma" @default.
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- W2076397329 doi "https://doi.org/10.1016/s0360-3016(96)00452-x" @default.
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