The study will provide a precise control compared to the two interventions (iso vs antiperistaltic anastomoses) with thorough measurements of the postoperative variables and complications to improve the evaluation of the surgical technique. It will also enable an evaluation of the quality of life after the procedures.

Inclusion Criteria:

• The patient has given informed consent to participate

• No surgery contraindications

• Elective surgery

• No pregnancy or nursery during the study

• Older than 18 years

• Complete preoperative cancer staging

• Tumour characteristics:

  • Cecum, ascending, hepatic angle or transverse colon tumour confirmed by endoscopic biopsy
  • Radiologically resectable tumours
  • Absence of vascular, nervous or bone infiltration
  • T4 stages with near organ infiltration
  • Absence of peritoneal carcinomatosis
  • Absence of respiratory pathology that prevents for doing hydrogen breath test

Exclusion Criteria:

• Pregnancy
• Intestinal bowel disease like Crohn's disease or ulcerative colitis.
• Metastatic bone illness
• Previous abdominal surgery with bowel resection
• Malabsorption syndromes