The relation between lymph node status and survival in Stage I–III colon cancer: results from a prospective nationwide cohort study
Article first published online: 25 APR 2013
© 2012 The Authors. Colorectal Disease © 2012 The Association of Coloproctology of Great Britain and Ireland
Volume 15, Issue 5, pages 559–565, May 2013
How to Cite
Lykke, J., Roikjær, O., Jess, P. and The Danish Colorectal Cancer Group (2013), The relation between lymph node status and survival in Stage I–III colon cancer: results from a prospective nationwide cohort study. Colorectal Disease, 15: 559–565. doi: 10.1111/codi.12059
- Issue published online: 25 APR 2013
- Article first published online: 25 APR 2013
- Accepted manuscript online: 12 OCT 2012 12:05PM EST
- Manuscript Accepted: 16 JUL 2012
- Manuscript Received: 1 MAY 2012
- Colon cancer;
- lymph node;
This study involved a large nationwide Danish cohort to evaluate the hypothesis that a high lymph node harvest has a positive effect on survival in curative resected Stage I–III colon cancer and a low lymph node ratio has a positive effect on survival in Stage III colon cancer.
Analysis of overall survival was conducted using a nationwide Danish cohort of patients treated with curative resection of Stage I–III colon cancer. All 8901 patients in Denmark diagnosed with adenocarcinoma of the colon and treated with curative resection in the period 2003–2008 were identified from the Danish Colorectal Cancer Group (DCCG). The impact of lymph node count and lymph node ratio was analysed.
Overall 5-year survival was 56.8 and 66.6%, (P < 0.0001) for lymph node counts of fewer than 12 and 12 or more, respectively. The percentages of lymph node positive patients in the two groups were 29.8 and 40.3% (P < 0.0001), respectively.
When putting the Stage III patients into four subgroups according to the lymph node ratio (cut-off points 1/12, 1/4 and 1/2) we found an overall 5-year survival rate of 68.1, 57.2, 49.3 and 32.4% (P < 0.0001). Lymph node count and lymph node ratio were independent prognostic factors in multivariate analysis.
High lymph node count was associated with improved overall survival in colon cancer. Lymph node ratio was superior to N-stage in differentiating overall survival in Stage III colon cancer. Stage migration was observed.