Clinical Outcomes of Definitive Intensity-Modulated Radiation Therapy With Fluorodeoxyglucose-Positron Emission Tomography Simulation in Patients With Locally Advanced Cervical Cancer

Elizabeth A. Kidd, Barry A. Siegel, Farrokh Dehdashti, Janet S. Rader, Sasa Mutic, David G. Mutch, Matthew A. Powell, Perry W. Grigsby

Research output: Contribution to journalArticlepeer-review

141 Scopus citations

Abstract

Purpose: This study aimed to evaluate the toxicity and clinical outcomes for cervical cancer patients treated definitively with intensity-modulated radiation therapy (IMRT) compared with non-IMRT treatment. Methods and Materials: This prospective cohort study included 452 patients with newly diagnosed cervical cancer treated with curative intent (135 IMRT and 317 non-IMRT). Treatment involved external irradiation and brachytherapy, and 85% of patients received concurrent chemotherapy. All IMRT patients underwent an F-18 fluorodeoxyglucose positron emission tomography (FDG-PET/CT) simulation. A 3-month post-therapy PET was obtained to evaluate treatment response. Toxicity was scored by the Common Terminology Criteria for Adverse Events Version 3.0. Results: The IMRT and non-IMRT groups had similar stage distribution and histology. For all patients, the post-therapy FDG-PET response correlated with overall recurrence risk (p < 0.0001) and cause-specific survival (p < 0.0001). Post-treatment FDG-PET findings were not significantly different between the IMRT and non-IMRT patients (p = 0.9774). The mean follow-up for all patients alive at the time of last follow-up was 52 months (72 months non-IMRT, 22 months IMRT). At last follow-up, 178 patients (39 IMRT, 139 non-IMRT) had developed a recurrence. The difference in recurrence-free survival between the two groups did not reach statistical significance (p = 0.0738), although the IMRT group showed better overall and cause-specific survivals (p < 0.0001). Of the patients, 62 patients (8 IMRT and 54 non-IMRT) developed Grade 3 or greater bowel or bladder complications, and by cumulative hazard function analysis the risk was significantly less for patients treated with IMRT (p = 0.0351). Conclusion: Cervical cancer patients treated with FDG-PET/CT-guided IMRT have improved survival and less treatment-related toxicity compared with patients treated with non-IMRT radiotherapy.

Original languageEnglish
Pages (from-to)1085-1091
Number of pages7
JournalInternational Journal of Radiation Oncology Biology Physics
Volume77
Issue number4
DOIs
StatePublished - Jul 15 2010

Keywords

  • Cervix
  • FDG-PET/CT
  • IMRT
  • Image guidance
  • Non-IMRT

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