Colorectal cancer is a common malignancy in Viet Nam. Laparoscopic surgery becomes a standard treatment in many centers. Today, robotic surgery is a new option for treating colorectal cancer with some advantages such as magnified 3D view, precise movements.

Answer on safety and feasibility of robotic surgery for colorectal cancer are not available in Viet Nam. Therefore, the investigators conducted a study " Robotic versus Laparoscopic Approach for Rectal Cancer Surgery".

Rectal cancer is a common surgical disease

Inclusion Criteria:

• able to provide written informed consent
• Diagnosis of rectal cancer amenable to curative surgery by anterior resection, low anterior resection, ultra-low anterior resection, abdominal perineal resection, staged T1-T4a, N0-2, M0

Exclusion Criteria:

• Advanced cancer not amenable to curative surgery
• patient did not agree to participate in research