Radiation Oncology Journal

The Korean Society for Radiation Oncology (대한방사선종양학회)
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Clinical outcomes of adjuvant radiation therapy and prognostic factors in early stage uterine cervical cancer

  • Kim, Hyun Ju (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Rhee, Woo Joong (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Choi, Seo Hee (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Nam, Eun Ji (Department of Obstetrics and Gynecology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Kim, Sang Wun (Department of Obstetrics and Gynecology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Kim, Sunghoon (Department of Obstetrics and Gynecology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Kim, Young Tae (Department of Obstetrics and Gynecology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Kim, Gwi Eon (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine) ;
  • Kim, Yong Bae (Department of Radiation Oncology, Yonsei Cancer Center, Yonsei University College of Medicine)
  • Received : 2015.05.07
  • Accepted : 2015.06.16
  • Published : 2015.06.30
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Abstract

Purpose: To evaluate the outcomes of adjuvant radiotherapy (RT) and to analyze prognostic factors of survival in the International Federation of Gynecology and Obstetrics (FIGO) IB-IIA uterine cervical cancer. Materials and Methods: We retrospectively reviewed the medical records of 148 patients with FIGO IB-IIA uterine cervical cancer who underwent surgery followed by adjuvant RT at the Yonsei Cancer Center between June 1997 and December 2011. Adjuvant radiotherapy was delivered to the whole pelvis or an extended field with or without brachytherapy. Among all patients, 57 (38.5%) received adjuvant chemotherapy either concurrently or sequentially. To analyze prognostic factors, we assessed clinicopathologic variables and metabolic parameters measured on preoperative 18F-fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT). To evaluate the predictive performance of metabolic parameters, receiver operating characteristic curve analysis was used. Overall survival (OS) and disease-free survival (DFS) were analyzed by the Kaplan-Meier method. Results: The median follow-up period was 63.2 months (range, 2.7 to 206.8 months). Locoregional recurrence alone occurred in 6 patients, while distant metastasis was present in 16 patients, including 2 patients with simultaneous regional failure. The 5-year and 10-year OSs were 87.0% and 85.4%, respectively. The 5-year and 10-year DFSs were 83.8% and 82.5%, respectively. In multivariate analysis, pathologic type and tumor size were shown to be significant prognostic factors associated with both DFS and OS. In subset analysis of 40 patients who underwent preoperative PET/CT, total lesion glycolysis was shown to be the most significant prognostic factor among the clinicopathologic variables and metabolic parameters for DFS. Conclusion: Our results demonstrated that adjuvant RT following hysterectomy effectively improves local control. From the subset analysis of preoperative PET/CT, we can consider that metabolic parameters may hold prognostic significance in early uterine cervical cancer patients. More effective systemic treatments might be needed to reduce distant metastasis in these patients.

Keywords

References

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