Comparison Between End-to-side and Side-to-side Anastomosis After Laparoscopic Right Hemicolectomy

Inclusion Criteria: Patients who have all of the following: * Age: 18 - 80 * Right-sided colon cancer (adenocarcinoma, located in cecum to hepatic flexure) * Appropriate laboratory (Bone marrow) findings (Hemoglobin ≥ 10g/dl, White blood cell count ≥ 4,000/mm3, Platelet ≥ 100,000/mm3) * Appropriate renal function (Creatinine ≤ 1.5 mg/dl) * Appropriate cardio-pulmonary functions * Appropriate understanding of the study and provide the informed consent Exclusion Criteria: Patients who have 1 or more of the following: * Distant metastasis or locally advanced tumor which required combined resection of other organs, such as the ureter, duodenum, or small bowel. * Not suitable for laparoscopic surgery * Currently taking medication for dyschezia, such as constipation or diarrhea. * Not suitable for adapting enhanced recovery program due to underlying diseases, such as cardio-pulmonary disease, mental disorder, and etc. * Not suitable for participation in this clinical trial based on the judgment of the investigators