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- W2026596113 abstract "Purpose/Objective(s)To evaluate the effect of the surgery-radiotherapy interval (SRI) on local control in node-negative breast cancer patients treated with breast conserving surgery and adjuvant radiotherapy without chemotherapy.Materials/MethodsFrom February 1992 to January 2002, 171 patients with node-negative breast cancer underwent breast conserving surgery and adjuvant radiotherapy without chemotherapy. Whole breast was irradiated up to 50.4 Gy in 28 fractions followed by 10 Gy boost to tumor bed. Forty-nine patients received tamoxifen, as well. Patients were divided into 2 groups according to SRI: SRI <6 wks (128 patients) versus SRI ≥6 wks (43 patients). Median follow-up period was 87 months (range; 22-167).ResultsThe 8-year local control rates of patients with SRI <6 wks and ≥6 wks were 94.5% and 92.7%, respectively (p = 0.1140). When age, tumor size, resection margin status, the combination of hormonal therapy, and SRI were incorporated into Cox proportional hazard model, SRI <6 wks and age at diagnosis ≥40 yrs were associated with increased local control (p = 0.0343 and 0.0264, respectively). In the subgroup analysis, SRI <6 wks was correlated with higher local control rate for patients younger than 40 yrs (p = 0.0142). Among older patients, however, there was no statistical difference of local control according to SRI (p = 0.6655). Treatment interval had no impact on overall and distant metastasis-free survival.ConclusionsEarly radiotherapy within 6 wks after breast conserving surgery is associated with increased local control in patients with node-negative breast cancer not undergoing chemotherapy, especially in patients younger than 40 yrs old. Earlier treatment should be considered in this group of patients. Purpose/Objective(s)To evaluate the effect of the surgery-radiotherapy interval (SRI) on local control in node-negative breast cancer patients treated with breast conserving surgery and adjuvant radiotherapy without chemotherapy. To evaluate the effect of the surgery-radiotherapy interval (SRI) on local control in node-negative breast cancer patients treated with breast conserving surgery and adjuvant radiotherapy without chemotherapy. Materials/MethodsFrom February 1992 to January 2002, 171 patients with node-negative breast cancer underwent breast conserving surgery and adjuvant radiotherapy without chemotherapy. Whole breast was irradiated up to 50.4 Gy in 28 fractions followed by 10 Gy boost to tumor bed. Forty-nine patients received tamoxifen, as well. Patients were divided into 2 groups according to SRI: SRI <6 wks (128 patients) versus SRI ≥6 wks (43 patients). Median follow-up period was 87 months (range; 22-167). From February 1992 to January 2002, 171 patients with node-negative breast cancer underwent breast conserving surgery and adjuvant radiotherapy without chemotherapy. Whole breast was irradiated up to 50.4 Gy in 28 fractions followed by 10 Gy boost to tumor bed. Forty-nine patients received tamoxifen, as well. Patients were divided into 2 groups according to SRI: SRI <6 wks (128 patients) versus SRI ≥6 wks (43 patients). Median follow-up period was 87 months (range; 22-167). ResultsThe 8-year local control rates of patients with SRI <6 wks and ≥6 wks were 94.5% and 92.7%, respectively (p = 0.1140). When age, tumor size, resection margin status, the combination of hormonal therapy, and SRI were incorporated into Cox proportional hazard model, SRI <6 wks and age at diagnosis ≥40 yrs were associated with increased local control (p = 0.0343 and 0.0264, respectively). In the subgroup analysis, SRI <6 wks was correlated with higher local control rate for patients younger than 40 yrs (p = 0.0142). Among older patients, however, there was no statistical difference of local control according to SRI (p = 0.6655). Treatment interval had no impact on overall and distant metastasis-free survival. The 8-year local control rates of patients with SRI <6 wks and ≥6 wks were 94.5% and 92.7%, respectively (p = 0.1140). When age, tumor size, resection margin status, the combination of hormonal therapy, and SRI were incorporated into Cox proportional hazard model, SRI <6 wks and age at diagnosis ≥40 yrs were associated with increased local control (p = 0.0343 and 0.0264, respectively). In the subgroup analysis, SRI <6 wks was correlated with higher local control rate for patients younger than 40 yrs (p = 0.0142). Among older patients, however, there was no statistical difference of local control according to SRI (p = 0.6655). Treatment interval had no impact on overall and distant metastasis-free survival. ConclusionsEarly radiotherapy within 6 wks after breast conserving surgery is associated with increased local control in patients with node-negative breast cancer not undergoing chemotherapy, especially in patients younger than 40 yrs old. Earlier treatment should be considered in this group of patients. Early radiotherapy within 6 wks after breast conserving surgery is associated with increased local control in patients with node-negative breast cancer not undergoing chemotherapy, especially in patients younger than 40 yrs old. Earlier treatment should be considered in this group of patients." @default.
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- W2026596113 date "2009-11-01" @default.
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- W2026596113 title "Impact of Delayed Radiotherapy on Local Control in Node-negative Breast Cancer Patients Treated with Breast Conserving Surgery and Adjuvant Radiotherapy without Chemotherapy" @default.
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- W2026596113 doi "https://doi.org/10.1016/j.ijrobp.2009.07.468" @default.
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