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Year : 2017  |  Volume : 50  |  Issue : 2  |  Page : 45-51

Prognostic effects of O6-Methylguanine DNA methyltransferase promoter hypermethylation in high-grade glioma patients with carmustine wafer implants

1 Department of Surgery, Division of Neurosurgery, Chang Gung Memorial Hospital, Taoyuan, Taiwan
2 Department of Radiation Oncology, Chang Gung Memorial Hospital, Taoyuan, Taiwan
3 Department of Pathology, Chang Gung Memorial Hospital, Taoyuan, Taiwan

Correspondence Address:
Kuo-Chen Wei
Department of Surgery, Division of Neurosurgery, Chang Gung Memorial Hospital, 5 Fu-Shin Street, Kwei-Shan, Taoyuan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/fjs.fjs_18_17

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Background: Local chemotherapy with carmustine (BCNU) wafer implantation has survival benefits for malignant glioma patients. However, available data regarding its association with O6-methylguanine-DNA-methyltransferase (MGMT) are scant. Purpose: To evaluate whether MGMT hypermethylation has prognostic effects in malignant glioma patients with interstitial BCNU wafer implants. Methods: From September 2004 to August 2007, 32 patients with malignant gliomas underwent surgical resection plus interstitial BCNU wafer implantation at our hospital. Results and Conclusion: BCNU wafer implantation was performed in 18 patients with newly diagnosed gliomas and in 14 with recurrent gliomas. All patients had a Karnofsky performance status of ≥70. The median age was 51 years. At a median follow-up of 31 months, the 1- and 2-year overall survival (OS) rate was 43% and 22%, respectively. OS rates did not significantly differ between the newly diagnosed and recurrent patients. Gross total tumor resection was achieved in 19 (59%) patients, and MGMT hypermethylation was noted in 13 (41%) tumor specimens. Multivariate analysis demonstrated that patients with MGMT hypermethylation in their tumors and gross total tumor removal have more favorable survival rates (P = 0.03).

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