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X. Fu



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    MA05 - Innovative Techniques in Pulmonology and the Impact on Lung Cancer (ID 378)

    • Event: WCLC 2016
    • Type: Mini Oral Session
    • Track: Pulmonology
    • Presentations: 1
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      MA05.09 - There is a Closely Relation between Exhaled Nitric Oxide and Radiation Pneumonitis (ID 5977)

      17:00 - 17:06  |  Author(s): X. Fu

      • Abstract
      • Presentation
      • Slides

      Background:
      Radiation pneumonitis is a major toxicity after the thoracic radiotherapy, with no method available to accurately predict the individual risk. This was a prospective study to evaluate the exhaled nitric oxide as a predictive biomarker for radiation pneumonitis in the patients received the thoracic radiotherapy

      Methods:
      A total of 68 patients with lung cancer or esophageal cancer, who received the thoracic radiotherapy, were enrolled in the present study. Each patients underwent the exhaled nitric oxide measurement before the radiotherapy and at the end of radiotherapy. Pneumonitis toxicity was scored using the Common Terminology Criter

      Results:
      Of the 68 patients, 65 were evaluable. The pneumonitis toxicity grade were grade 3 for 6, grade 2 for 11 and grade0-1 for48. The exhaled NO measured before radiotherapy and at the end of radiotherapy were 23.05±9.59 (range 10-53) and 22.89±8.60(range 11-60) ppbs.For the exhaled NO ratio, the AUC is 0.879 (95%CI0.774-0.984). The accuracy of predicting the symptomatic patients was identified “good” according to the predictive ability criteria and the optimal cutoff value was tested as 1.305. For the exhaled at the end of RT, the AUC is 0.774 (95%CI 0.656-0.892). The accuracy of predictive the symptomatic patients was evaluated “fair” ,The optimal cutoff value was identified 19.5 ppbs.

      Conclusion:
      The exhaled nitric oxide ratio>1.305 or the exhaled nitric oxide at the end of radiotherapy>19.5ppbs was found to have a closely relation with radiation pneumonitis.

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