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The number of retrieved lymph nodes needed for accurate staging differs based on the presence of preoperative chemoradiation for rectal cancer

 Jeonghee Han  ;  Gyoung Tae Noh  ;  Shen Ann Yeo  ;  Chinock Cheong  ;  Min Soo Cho  ;  Hyuk Hur  ;  Byung Soh Min  ;  Kang Young Lee  ;  Nam Kyu Kim 
 MEDICINE, Vol.95(38) : 4891, 2016 
Journal Title
Issue Date
Adenocarcinoma/pathology* ; Adenocarcinoma/therapy ; Adult ; Aged ; Aged, 80 and over ; Chemoradiotherapy, Adjuvant ; Female ; Follow-Up Studies ; Humans ; Lymph Node Excision ; Lymph Nodes/pathology* ; Lymphatic Metastasis ; Male ; Middle Aged ; Neoplasm Staging ; Prognosis ; Rectal Neoplasms/pathology* ; Rectal Neoplasms/therapy ; Retrospective Studies ; Risk Factors ; Survival Rate ; Young Adult
lymph node ; preoperative chemoradiotherapy ; rectal cancer ; stage migration
The aim of this study is to investigate if retrieval of 12 lymph nodes (LNs) is sufficient to avoid stage migration as well as to evaluate the prognostic impact of insufficient LN retrieval in different treatment settings of rectal cancer, particularly in the case of preoperative chemoradiotherapy (pCRT).The data of all patients with biopsy proven rectal adenocarcinoma who underwent curative surgery between January 2005 and December 2012 were analyzed. Univariate and multivariate analyses for oncologic outcomes were performed in LN metastasis or no LN metastasis (LN-) group. Subgroup analyses were performed according to whether a patient had received pCRT.A total of 1825 patients were enrolled into the study. The maximal Chi-square method revealed the minimum number of harvested LNs required to be 12. Univariate and multivariate analyses found LNs?≥?12 to be an independent prognostic factor for both overall survival (OS) (hazard ratio [HR] = 0.5, 95% confidence intervals [CIs]: 0.3-0.8; P = 0.002) and disease-free survival (DFS) (HR = 0.6, 95% CI: 0.4-0.7; P?<?0.001) in the LN- group. In the LN- group, LNs?≥?12 continued to be a significant prognostic factor both for OS and DFS in the subgroup of patients who did not undergo pCRT. However, in the subgroup of the LN- patients who underwent pCRT, LN?≥?8 was significant for DFS and OS.Retrieval of LNs?≥?12 and LNs?≥?8 should be achieved to obtain accurate staging and optimal treatment for the non-pCRT and pCRT groups in rectal cancer, respectively.
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1. College of Medicine (의과대학) > Dept. of Surgery (외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Nam Kyu(김남규) ORCID logo https://orcid.org/0000-0003-0639-5632
Min, Byung Soh(민병소) ORCID logo https://orcid.org/0000-0003-0180-8565
Lee, Kang Young(이강영)
Cheong, Chin Ock(정진옥)
Cho, Min Soo(조민수)
Han, Jeong Hee(한정희)
Hur, Hyuk(허혁) ORCID logo https://orcid.org/0000-0002-9864-7229
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