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- W2023742261 abstract "Different radiation therapy schedules and devices have been used over the last 20 years at Rabin Medical Center in patients with early glottic cancer. The aim of the present retrospective analysis was to identify the subgroup of patients at high risk of failure of radiation treatment.Between 1974 and 1994, 207 patients with squamous cell carcinoma of the glottis, 182 Stage T1 and 25 Stage T2, underwent definitive radiation therapy. During this period, treatment was administered with different radiation devices (60Co or 6-MV X ray), using different dose/fraction protocols (1.8 or 2 Gy per day, 5 or 6 fractions per week), total doses (42-77.4 Gy), overall radiation times, and delays. These treatment variables, in addition to certain patient and tumor characteristics, were correlated with local control at a median follow-up of 57 months (range 18-265 months).The 5-year local control rates for T1 and T2 tumors were 88% and 73%, respectively. Univariate analysis showed that smoking, diabetes mellitus, anterior commissure involvement, T stage, and extension of tumor to one third or more of the vocal cord were highly significantly correlated with decreased local control. None of the treatment variables, including dosage at which complete tumor regression was noted, were found to be predictive. By multivariate analysis, only anterior commissure involvement was found to be highly significant (risk ratio 1.9, 95% CI 1.2-3.0, p = 0.027), and T stage was borderline significant (risk ratio 1.6, 95% CI 1.0-2.5, p = 0.054).This study suggests that only two tumor characteristics are predictive of local failure of early glottic cancer: anterior commissure involvement and T stage. Treatment variables apparently do not influence local control." @default.
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- W2023742261 date "1999-03-01" @default.
- W2023742261 modified "2023-10-01" @default.
- W2023742261 title "Prognostic factors for local control of early glottic cancer: the Rabin Medical Center retrospective study on 207 patients" @default.
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- W2023742261 doi "https://doi.org/10.1016/s0360-3016(98)00547-1" @default.
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