Robotic vs Laparoscopic Rectal Cancer Surgery: BJS Open | June 2026

• This large population-based Swedish study compared robotic-assisted and conventional laparoscopic rectal cancer surgery using real-world national registry data.
• A total of 5,874 patients undergoing minimally invasive rectal cancer resection were analysed, including more than 3,500 robotic procedures.
• The primary endpoint was circumferential resection margin positivity (CRM+), a key surrogate marker of oncologic quality.
• Robotic surgery did not reduce CRM positivity compared with conventional laparoscopy.
• On multivariable analysis, robotic surgery was not associated with superior short-term oncologic outcomes.
• One of the major advantages of robotic surgery was a significantly lower conversion rate to open surgery.
• Conversion occurred in approximately 9% of robotic cases compared with 16% of laparoscopic cases, representing a substantial reduction.
• Lower conversion rates may be particularly important in obese patients, narrow pelvises, low rectal tumours, and technically challenging operations.
• Unexpectedly, robotic surgery was associated with a higher rate of surgical complications.
• Anastomotic leak rates were higher in the robotic group than in the laparoscopic group.
• Robotic surgery was also associated with fewer complete total mesorectal excision (TME) specimens, an unexpected finding that warrants further investigation.
• The study challenges the assumption that superior technology necessarily translates into better oncologic outcomes.
• The findings suggest that the main benefit of robotic surgery may be technical facilitation rather than improved cancer clearance.
• Long-term oncologic outcomes, local recurrence rates, disease-free survival, and overall survival remain important unanswered questions.
• The authors emphasise that further research is needed to understand why robotic surgery reduced conversion rates but was associated with higher leakage rates and less complete TME specimens.

Bottom line: In this large national cohort, robotic rectal cancer surgery reduced conversion to open surgery but did not improve circumferential margin positivity and was associated with higher anastomotic leak rates. The true value of robotic surgery may lie in technical advantages rather than superior oncologic outcomes.