PMID: 18210881Jan 24, 2008Paper

Influence of number of removed lymph nodes on the TNM staging and survival in advanced esophageal carcinoma

Zhonghua zhong liu za zhi [Chinese journal of oncology]
Long-Qi ChenYumin Ping

Abstract

To evaluate the impact of total number of removed regional lymph nodes (LN) during esophagectomy on TNM staging and long-term survival. Between 1984 and 1989, a total of 1098 patients with advanced squamous cell carcinoma of the thoracic esophagus were surgically treated, and the data were retrospectively analyzed. The survival was analyzed by Kaplan-Meier method. Multivariate and univariate analysis were performed using Cox proportional hazard model and Log-rank test respectively in order to compare the survival difference and the impact of <6 or > or =6 removed LN on TNM staging and survival. The shortest follow-up time was 10 years with a follow-up rate of 91.4%. Of these 1098 patients, 378 patients were found to have regional LN metastases with a LN metastasis rate of 34.4%. Totally, 4157 LN were removed and tumor spreading into the lymph node was documented in 800 with a lymph node metastasis degree of 19.2%. The mean number of removed LN in each esophgectomy was 3.8. According to the number of total removed LN, patients were divided into group A (removed LN <6, N=825) and group B (removed LN > or =6, N=273). The survival of group A was worse than that of group B. The depth of tumor invasion, degree of lymph node metastasi...Continue Reading

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