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Prognostic Factors Influencing the Result of Postoperative Radiotherapy in Endometrial Carcinoma  

Ki Yong-Kan (Departments of Radiation Oncology and Pusan National University School of Medicine)
Kwon Byung-Hyun (Departments of Radiation Oncology and Pusan National University School of Medicine)
Kim Won-Taek (Departments of Radiation Oncology and Pusan National University School of Medicine)
Nam Ji-Ho (Departments of Radiation Oncology and Pusan National University School of Medicine)
Yun Man-Su (Obstetrics and Gynecology, Pusan National University School of Medicine)
Lee Hyung-Sik (Department of Radiation Oncology, Dong-A University School of Medicine)
Kim Dong-Won (Departments of Radiation Oncology and Pusan National University School of Medicine)
Publication Information
Radiation Oncology Journal / v.24, no.2, 2006 , pp. 110-115 More about this Journal
Abstract
Purpose: This study was performed to determine the prognostic factors influencing relapse pattern, overall and disease-free survival in patients treated with postoperative radiotherapy for endometrial carcinoma. Materials and Methods: The records of 54 patients with endometrial adenocarcinoma treated postoperative radiotherapy at Pusan National University Hospital between April 1992 and May 2003 were reviewed retrospectively. Median age of the patients was 55 (range $35{\sim}76$). The distribution by surgical FIGO stages were 63.0% for 0Stage I, 14.8% for Stage II, 22.2% for Stage III. All patients received postoperative external radiotherapy up to $41.4{\sim}54Gy$ (median: 50.4 Gy). Additional Intravaginal brachytherapy was app led to 20 patients (37.0% of all). Median follow-up time was 35 months ($5{\sim}115$ months). Significant factors of this study: histologic grade, Iymphovascular space invasion and myometrial invasion depth were scored (GLM score) and analyzed. Survival analysis was peformed using Kaplan-Meier method. The log-rank test was used for univariate analysis and the Cox regression model for multivariate analysis. Results: 5-year overall and disease-free survival rates were 87.7% and 871%, respectively. Prognostic factors related with overall and disease-free survival were histologic grade, Iymphovascular space invasion and myometrial invasion according to the univariate analysis. According to the multivariate analysis, Iymphovascular space invasion was associated with decreased disease-free survival. GLM score was a meaningful factor affecting overall and disease-free survival (p=0.0090, p=0.0073, respectively) and distant recurrence (p=0.0132), which was the sum of points of histologic grade, Iymphovascular space Invasion and myometrial invasion. Total failure rate was 11% with 6 patients. Relapse sites were 2 para-aortic Iymph nodes, 2 lungs, a supraclavicular Iymph node and a vagina. Conclusion: The prognosos in patients with endometrial carcinoma treated by postoperative radiotherapy was closely related with surgical histopathology. If further explorations confirm the system of prognostic factors in endometrial carcinoma, it will help us to predict the progression pattern and to manage.
Keywords
Endometrial carcinoma; Postoperative radiotherapy; Prognostic factor;
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