Impact of Radiation Dose to Circulating Immune Cells on Tumor Control and Survival in Esophageal Cancer.

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  • Additional Information
    • Source:
      Publisher: Mary Ann Liebert, Inc Country of Publication: United States NLM ID: 9605408 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1557-8852 (Electronic) Linking ISSN: 10849785 NLM ISO Abbreviation: Cancer Biother Radiopharm Subsets: MEDLINE
    • Publication Information:
      Original Publication: Larchmont, NY : Mary Ann Liebert, Inc., c1996-
    • Subject Terms:
    • Abstract:
      Background: The immune system is well known to exert tumor immunosurveillance effects, and that immune cells circulating in the peripheral blood affect tumor prognosis. The study investigated the effect of estimated dose of radiation on circulating immune cells (EDRIC) and tumor control for esophageal cancer patients treated with concurrent chemo-radiotherapy. Materials and Methods: A total of 146 esophageal cancer patients treated with radiotherapy between January 2016 and June 2020 were retrospectively identified. We determined EDRIC, known prognostic factors, and the association of these factors with progression-free survival (PFS) and overall survival (OS). Results: The median follow-up was 17.9 months (2.7-60.4 months). The 3-year OS was 39.2%. Severe post-treatment lymphopenia was observed in 84.2% of patients. A negative correlation between EDRIC and absolute lymphocyte count was found ( r  = -0.679; p  < 0.001). Patients with EDRIC ≥10.3 Gy were more likely to demonstrate grade 4 lymphopenia (55.2% vs. 4.5%; p  < 0.001). Patients with grade 4 lymphopenia had a worse OS and PFS. On multivariate analysis, EDRIC was independently associated with OS (hazard ratio [HR], 1.142; p  = 0.016) and PFS (HR, 1.121; p  = 0.019). Conclusions: EDRIC can predict lymphocyte reduction and poor prognosis for esophageal cancer patients treated with radiotherapy.
    • Contributed Indexing:
      Keywords: concurrent chemoradiotherapy; esophageal carcinoma; estimated dose of radiation to circulating immune cells (EDRIC); lymphopenia
    • Publication Date:
      Date Created: 20211209 Date Completed: 20230816 Latest Revision: 20230816
    • Publication Date:
      20240105
    • Accession Number:
      10.1089/cbr.2021.0250
    • Accession Number:
      34883023