Clinical study on the efficacy comparison between ileotransverse colon overlap anastomosis and π-shaped anastomosis in laparoscopic radical right hemicolectomy

Objective To compare the safety and efficacy of ileotransverse colon Overlap and π-shaped anastomosis in laparoscopic radical right hemicolectomy (LRRH). Methods A prospective RCT enrolled 120 right colon cancer patients (Dec 2022–Dec 2024) randomized to Overlap ( n = 60) or π-shaped ( n = 60) group. Perioperative indicators, inflammatory/nutritional markers, gastrointestinal function recovery, 30-day complications (clinical anastomotic leakage, Clavien-Dindo ≥ II) and hospital stay were compared. Results No significant preoperative baseline differences were found between groups ( P 0.05). The Overlap group had shorter anastomosis/operative time, milder postoperative inflammation, faster nutritional/gastrointestinal recovery, and earlier liquid diet tolerance (all P 0.01). Clinical anastomotic leakage incidence showed no intergroup difference ( P 0.05). Conclusion Overlap anastomosis is a preferable reconstruction method for LRRH, with advantages in short-term recovery. However, this study failed to demonstrate its superiority in reducing clinical anastomotic leakage due to limited sample size and statistical power, and results should be interpreted with caution.