Age

18–any

Sex

ALL

Healthy volunteers

Not accepted

Age ≥ 18 years.
Planned (elective) left-sided colorectal resection with creation of a colorectal anastomosis, including: Left hemicolectomy, and/or Sigmoid resection, and/or Partial mesorectal excision (PME).
Benign or malignant indication.
Prospective cohort: Ability to provide written informed consent.

Total mesorectal excision (TME) (e.g., low rectal cancer surgery requiring TME).
Non-left-sided colorectal resections (e.g., right-sided colectomy) or procedures outside the study-defined operations.
Surgery not involving a colorectal anastomosis (e.g., end colostomy/Hartmann's procedure without anastomosis).
Emergency/urgent colorectal resection (non-elective surgery).
Prospective cohort: Inability to provide informed consent.

Single-Stapled Technique for Colorectal Anastomosis