Effect of number of dissected lymph nodes on prognosis of patients with stage II and III colorectal cancer

Aim: There is a correlation between the number of resected lymph nodes (LNs) and survival as well staging in patients with colorectal cancer (CRC). This cohort discussed effect dissected LNs on prognosis [survival, disease-free (DFS)] stage II III CRC. Methods: In this historical prospective study, records 946 CRC operated Seyyed-Al-Shohada hospital Isfahan from 1998 to 2014 were enrolled. Then impact overall (OS) DFS analyzed. Results: The removed was higher among males [mean difference = 1.38, t (944) 2.232, P-value 0.02]. median for 1 20 LN removal 104 months [95% confidence interval (CI): 90.97–117.03], while more than 166 (95% CI: 140.41–191.58). two groups CRCs, 1–20, greater 20. Age significant predictors DFS. strong statistically OS patients. Conclusions: study shows that if 20, it will increase OS.