Cancer Management and Research (Sep 2020)

The Predictive Value of MLR for Radiation Pneumonia During Radiotherapy of Thoracic Tumor Patients

  • Gao Y,
  • Wu X,
  • Li Y,
  • Li Y,
  • Zhou Q,
  • Wang Q,
  • Wei C,
  • Shi D,
  • Xie C,
  • Pan H

Journal volume & issue
Vol. Volume 12
pp. 8695 – 8701

Abstract

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Ya Gao, Xinyi Wu, Yunhao Li, Yifei Li, Qingyu Zhou, Qiongqiong Wang, Chaoyi Wei, Deli Shi, Congying Xie, Huanle Pan Department of Radiotherapy and Chemotherapy, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People’s Republic of ChinaCorrespondence: Congying Xie; Huanle PanDepartment of Radiotherapy and Chemotherapy, The First Affiliated Hospital of Wenzhou Medical University, No. 2 Fuxue Street, Wenzhou, Zhejiang 325000, People’s Republic of ChinaTel +86 138 6771 1881; +8615088980299Fax +86 577 8806 9372Email [email protected]; [email protected]: To evaluate the predictive value of blood lymphocyte, monocyte to lymphocyte ratio (MLR), and neutrophil to lymphocyte ratio (NLR) for radiation pneumonia (RP) in patients with thoracic tumors receiving radiotherapy.Patients and Methods: The clinical data of 65 patients with thoracic tumor (esophageal cancer, lung cancer) treated by radiotherapy in our hospital were retrospectively analyzed. Patients were divided into the RP group and the non-RP group according to the Common Terminology Criteria for Adverse Events (CTCAE 5.0). Data on blood cell counts, including lymphocytes, monocytes, and neutrophils, were collected before (0 weeks) and after 1, 2, and 4 weeks of radiotherapy.Results: Of the 65 patients enrolled, 27 developed radiation pneumonia and 38 did not. Patients’ clinical factors, including age, TNM stage, tumor type, underlying lung disease, and history of smoking, had no correlation with RP. ANOVA of repeated measurement data showed that the changes of MLR in the group with RP during radiotherapy were significantly different from those in the non-RP group (P< 0.05). The RP prediction model based on the identified risk factors was established using receiver operator characteristic curves. The results showed that the area under the curve for the monocyte to lymphocyte ratio was 0.755 (95% CI, 0.63– 0.87, P=0.000), and the best cutoff point for MLR was 0.426.Conclusion: MLR could predict radiation pneumonia in patients with thoracic tumor radiotherapy and achieve early monitoring, early prevention, and treatment.Keywords: cancer, radiotherapy, radiation pneumonitis, monocyte to lymphocyte ratio

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