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Πέμπτη 23 Νοεμβρίου 2017

The impact of adjuvant vaginal brachytherapy in women with Stage II uterine endometrioid carcinoma: Results of a National Cancer Database analysis

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Publication date: Available online 23 November 2017
Source:Brachytherapy
Author(s): Joon K. Lee, Ahmed I. Ghanem, Ankit Modh, Charlotte Burmeister, Omar Mahmoud, G. Larry Maxwell, Mohamed A. Elshaikh
PurposeTo report survival outcomes in women with Stage II uterine endometrioid carcinoma who received adjuvant radiation therapy (RT) without chemotherapy using the National Cancer Database.Methods and MaterialsThe National Cancer Database was queried for women with International Federation of Gynecology and Obstetrics Stage II uterine endometrioid carcinoma who underwent hysterectomy followed by adjuvant RT without chemotherapy. The χ2 tests were performed to compare differences in outcome by type of adjuvant RT (external beam radiation therapy [EBRT] alone, vaginal brachytherapy [VBT] alone, or combination of EBRT and VBT). Overall survival (OS) was assessed by Kaplan–Meier and log-rank tests. Univariate and multivariate analyses were performed to identify predictors of OS.ResultsWe identified 2681 women. Simple hysterectomy was performed on 2261 women (84%). Adjuvant EBRT, VBT, and combination RT were administered to 27%, 36%, and 37%, respectively. There was a statistically significant difference in OS by modality of adjuvant RT (p = 0.01) favoring women who received VBT alone or in combination with EBRT. The 5-year OS was 80%, 87%, and 83% for women who received EBRT, VBT, and combination RT, respectively (p = 0.001). On multivariate analysis, old age, African-American race, no or fewer number of examined lymph nodes, and higher tumor grade were independent predictors of worse OS. RT modality did not sustain its independent prognostic significance as a predictor of OS.ConclusionsIn this nationwide hospital-based study of women with International Federation of Gynecology and Obstetrics Stage II uterine endometrioid carcinoma, adjuvant VBT alone provided excellent survival outcomes and may be a reasonable adjuvant RT modality for properly selected women with adequate lymph node dissection and low-grade tumors.



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