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논문 기본 정보

자료유형
학술저널
저자정보
Woo, Jong-Yun (Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea) Yang, Seung Ho (Department of Neurosurgery, St. Vincent's Hospital, The Catholic University of Korea) Lee, Youn Soo (Department of Pathology, Seoul St. Mary's Hospital, The Catholic University of Korea) Lee, Su Youn (Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea) Kim, Jeana (Department of Hospital Pathology, Bucheon St.Mary's Hospital, The Catholic University of Korea) Hong, Yong Kil (Department of Neurosurgery, Seoul St. Mary's Hospital, The Catholic University of Korea)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제58권 제5호
발행연도
2015.1
수록면
426 - 431 (6page)

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Objective : The purpose of this study was to evaluate the clinical efficacy of continuous low-dose temozolomide (TMZ) chemotherapy for recurrent and TMZ-refractory glioblastoma multiforme (GBM) and to study the relationship between its efficacy and microvessel density within the tumor. Methods : Thirty patients who had recurrent GBM following Stupp's regimen received TMZ daily at $50mg/m^2/day$ until tumor progression between 2007 and 2013. The median duration of continuous low-dose TMZ administration was 8 weeks (range, 2-64). Results : The median progression-free survival (PFS) of continuous low-dose TMZ therapy was 2 months (range, 0.5-16). At 6 months, PFS was 20%. The median overall survival (OS) from the start of this therapy to death was 6 months (95% CI : 5.1-6.9). Microvessel density of recurrent tumor tissues obtained by reoperation of 17 patients was $22.7{\pm}24.1/mm^2$ (mean${\pm}$standard deviation), and this was lower than that of the initial tumor ($61.4{\pm}32.7/mm^2$) (p-value=0.001). It suggests that standard TMZ-chemoradiotherapy reduces the microvessel density within GBM and that recurrences develop in tumor cells with low metabolic burden. The efficacy of continuous low-dose TMZ could not be expected in recurrent GBM cells in poor angiogenic environments. Conclusion : The efficacy of continuous low-dose TMZ chemotherapy is marginal. This study suggests the need to develop further treatment strategies for recurrent and TMZ-refractory GBM.

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