Age between 18 and 75 years

American Society of Anesthesiologists (ASA) score I to III

A biopsy proven histological diagnosis of colorectal carcinoma

tumor located at hepatic flexure and right half of transverse colon

Undergoing right hemi-colectomy with extented lymphadenectomy of infrapyloric (No.206) and greater curvature (No.204) lymph node

Preoperative staging cT2-4aN0M0 or cTanyN+M0

Willing to participate and informed consent signed

Infrapyloric and Greater Curvature Lymph Node Metastasis in Colon Cancer