To analyse the lymph node involvement pattern in large intestine cancer after surgery and correlate with different clinical and pathological parameters for better surgical outcomes.

Intervention1: Colectomy: Different types of colectomy according to the site of colonic malignancy. Primary outcome(s): 1. To evaluate and calculate the lymphnode harvest rate in fresh specimen of colonic cancer. 2. To know the pattern of lymphnode spread in various location and T stage of primary colonic cancer.Timepoint: 2 years