San-Gang Wu1, Feng-Yan Li2, Juan Zhou3, Qin Lin1, Jia-Yuan Sun2, Huan-Xin Lin2, Xun-Xing Guan2, Zhen-Yu He4. 1. Department of Radiation Oncology, Xiamen Cancer Center, the First Affiliated Hospital of Xiamen University, Xiamen, People's Republic of China. 2. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Department of Radiation Oncology, Collaborative Innovation Center of Cancer Medicine, Guangzhou, People's Republic of China. 3. Department of Obstetrics and Gynecology, Xiamen Cancer Center, the First Affiliated Hospital of Xiamen University, Xiamen, People's Republic of China. 4. Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Department of Radiation Oncology, Collaborative Innovation Center of Cancer Medicine, Guangzhou, People's Republic of China. Electronic address: hezhy@sysucc.org.cn.
Abstract
BACKGROUND: This study aimed to investigate the prognostic value of number of involved lymph nodes, number of removed lymph nodes, ratio of involved to removed nodes (lymph node ratio), and number of negative lymph nodes in esophageal squamous cell carcinoma (ESCC) patients after esophagectomy. METHODS: A retrospective review of 603 patients receiving esophagectomy for ESCC was made. Cox regression analysis was performed to identify significant prognostic factors. RESULTS: The median follow-up time was 36.7 months, and the 5-year overall survival (OS) was 43.5%. Patients with negative lymph node count ≥ 14 had better survival (p < 0.001). Univariate Cox analysis showed that the number of involved lymph nodes, number of removed lymph nodes, lymph node ratio, and number of negative lymph nodes influenced OS (p < 0.05 for all). Multivariate Cox analysis indicated that the number of involved lymph nodes and number of negative lymph nodes were independent prognostic factors for OS, and a higher number of negative lymph nodes was associated with lower mortality. The number of removed lymph nodes and lymph node ratio had no significant effect on OS. The number of negative lymph nodes had prognostic value in different lymph node stages and in two-field or three-field lymphadenectomy. CONCLUSIONS: For ESCC patients after esophagectomy, the number of involved lymph nodes and the number of negative lymph nodes had a better prognostic value than did the number of removed lymph nodes and lymph node ratio.
BACKGROUND: This study aimed to investigate the prognostic value of number of involved lymph nodes, number of removed lymph nodes, ratio of involved to removed nodes (lymph node ratio), and number of negative lymph nodes in esophageal squamous cell carcinoma (ESCC) patients after esophagectomy. METHODS: A retrospective review of 603 patients receiving esophagectomy for ESCC was made. Cox regression analysis was performed to identify significant prognostic factors. RESULTS: The median follow-up time was 36.7 months, and the 5-year overall survival (OS) was 43.5%. Patients with negative lymph node count ≥ 14 had better survival (p < 0.001). Univariate Cox analysis showed that the number of involved lymph nodes, number of removed lymph nodes, lymph node ratio, and number of negative lymph nodes influenced OS (p < 0.05 for all). Multivariate Cox analysis indicated that the number of involved lymph nodes and number of negative lymph nodes were independent prognostic factors for OS, and a higher number of negative lymph nodes was associated with lower mortality. The number of removed lymph nodes and lymph node ratio had no significant effect on OS. The number of negative lymph nodes had prognostic value in different lymph node stages and in two-field or three-field lymphadenectomy. CONCLUSIONS: For ESCCpatients after esophagectomy, the number of involved lymph nodes and the number of negative lymph nodes had a better prognostic value than did the number of removed lymph nodes and lymph node ratio.