Objective To evaluate the long term effect of the number of resected lymph nodes on the prognosis of patients with node negative colorectal cancer. Method Fourty two patients with colorectal cancer were surgically treated and pathology revealed no microscopic nodal involvement. These patients were divided into two groups based on the number of harvested lymph nodes. The prognosis was analyzed retrospectively. Results The 5 year survival rate of the patients with more than 50 harvested lymphatic nodes wa...