Radiation Oncology Journal

The Korean Society for Radiation Oncology (대한방사선종양학회)
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Pelvic insufficiency fracture after radiotherapy in patients with cervical cancer in the era of PET/CT

  • Park, Shin-Hyung (Department of Radiation Oncology, Kyungpook National University School of Medicine) ;
  • Kim, Jae-Chul (Department of Radiation Oncology, Kyungpook National University School of Medicine) ;
  • Lee, Jeong-Eun (Department of Radiation Oncology, Kyungpook National University School of Medicine) ;
  • Park, In-Kyu (Department of Radiation Oncology, Kyungpook National University School of Medicine)
  • Received : 2011.09.02
  • Accepted : 2011.11.16
  • Published : 2011.12.31
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Abstract

Purpose: To determine the incidence, risk factors, and clinical characteristics of pelvic insufficiency fracture (PIF) in patients with cervical cancer. Materials and Methods: Between July 2004 and August 2009, 235 patients with non-metastatic cervical cancer were treated with definitive chemoradiation or postoperative radiotherapy. Among 235 patients, 117 (49.8%) underwent the first positron emission tomography/computed tomography (PET/CT) within 1 year after radiotherapy. The median radiation dose was 55 Gy (range, 45 to 60 Gy). Medical charts and imaging studies, including PET/CT, magnetic resonance imaging (MRI), CT. bone scintigraphy were reviewed to evaluate the patients with PIF. Results: Among 235 patients, 16 developed PIF. The 5-year detection rate of PIF was 9.5%. The 5-year detection rate of PIF in patients who underwent the first PET/CT within a year was 15.6%. The median time to development of PIF was 12.5 months (range, 5 to 30 months). The sites of fracture included 12 sacroiliac joints, 3 pubic rami, 3 iliac bones, and 1 femoral neck. Eleven of 16 patients having PIF complained of hip pain requiring medications. One patient required hospitalization for pain control. The significant risk factors of PIF were old age, body mass index less than 23, bone mineral density less than -3.5 SD, and the first PET/CT within a year after radiotherapy. Radiation dose and concurrent chemotherapy had no impact on PIF rate. Conclusion: PIFs were not rare after pelvic radiotherapy in cervical cancer patients in the era of PET/CT. Timely diagnosis and management of PIF can improve quality of life in patients with cervical cancer, in addition to reducing unnecessary medical expenses.

Keywords

References

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