en Radiation Biology Radiation Biology گزارش کوتاه Short Report <p style="text-align: justify;"><strong>Background:</strong> This study evaluated the relation between telomere length in lymph node (LN) and prognosis of esophageal squamous cell carcinoma (ESCC). &nbsp;<strong>Materials and Methods:</strong> LNs collected from 50 patients were assessed by pathological examination and quantitative reverse transcription polymerase chain reaction (qRT-PCR), which was used for detecting telomere length. The relation between clinical factors and the number of lymph node metastasis (LNM) identified were analyzed by the &chi;2 test. The comparison of the pattern of LNM identified by pathological examination and detection of telomere length was assessed by Wilcoxon signed-rank test. Overall survival was assessed using the Kaplan-Meier method, and&nbsp;Cox&nbsp;proportional hazard&nbsp;regression&nbsp;analysis was used to evaluate the relationship between survival and the number of LNM. &nbsp;<strong>Results:</strong> The best threshold values, which could define the positive metastasis by detecting the telomere length, were 1.50, using the critical value method of statistic. Length of tumor, depth of tumor invasion and differentiation of tumor correlated closely with LNM were identified by detecting telomere length. The rates of LNM identified by detecting telomere length were 34.4%, 22.4%, 22.9%, 5.0% in 108, 107, 7, and 3 LN station, respectively. The number of LNM identified by detecting telomere length was more closely related to the prognosis of ESCC than that of pathological examination (HR: 1.23 VERSUS 1.04). <strong>Conclusion:</strong> The change of telomere length in LN was closely related to the prognosis of ESCC. Delineation of clinical target volume (CTV) may benefit from the detection of telomere length in regional LN.</p> <p></p> Telomere length, lymph node, the clinical target volume, esophageal squamous cell carcinoma. 31 38 http://ijrr.com/browse.php?a_code=A-10-1-647&slc_lang=en&sid=1 J. Zhang 790031947532846009895 790031947532846009895 Yes Department of Radiation Oncology (chest section), Shandong's Key Laboratory of Radiation Oncology, Shandong Cancer hospital, Shandong University, Jinan, 250117, P. R. China J. Wang 790031947532846009896 790031947532846009896 No Department of Radiation Oncology (chest section), Shandong's Key Laboratory of Radiation Oncology, Shandong Cancer hospital, Shandong University, Jinan, 250117, P. R. China L. Li 790031947532846009897 790031947532846009897 No LinYi People Hospital, Affiliated to Shandong University, School of Medicine, NO. 27 JieFang Road, Linyi, 276000, Shandong Province, 250012 P. R. China Z. Li 790031947532846009898 790031947532846009898 No LinYi People Hospital, Affiliated to Shandong University, School of Medicine, NO. 27 JieFang Road, Linyi, 276000, Shandong Province, 250012 P. R. China X. Heng 790031947532846009899 790031947532846009899 No LinYi People Hospital, Affiliated to Shandong University, School of Medicine, NO. 27 JieFang Road, Linyi, 276000, Shandong Province, 250012 P. R. China