[Mesocolic excision for colonic adenocarcinoma]

Area of Science:

• Colorectal Surgery
• Surgical Oncology
• Gastrointestinal Pathology

Background:

• Complete mesocolic excision (CME) is a surgical technique analogous to total mesorectal excision.
• CME aims to improve specimen quality and oncological outcomes in colonic adenocarcinoma.
• Its application and efficacy vary between left and right colectomies.

Purpose of the Study:

• To evaluate the short- and long-term outcomes of complete mesocolic excision for colonic adenocarcinoma.
• To compare CME with conventional surgical approaches.
• To assess the impact of CME on specimen quality and lymph node yield.

Main Methods:

• Systematic review and meta-analysis of existing studies comparing CME with conventional surgery.
• Evaluation of postoperative morbidity, mortality, and oncological outcomes.
• Assessment of specimen quality, including lymph node harvest, for both techniques.

Main Results:

• CME typically yields higher quality specimens with increased lymph node retrieval, particularly in left colectomies.
• No significant differences in postoperative morbidity and mortality rates were observed between CME and conventional surgery.
• Limited evidence suggests improved disease-free survival in only two studies following CME.

Conclusions:

• Complete mesocolic excision provides superior specimen quality and lymph node yield without increasing surgical risks.
• Current evidence is insufficient to definitively conclude that CME improves long-term oncological outcomes for colonic adenocarcinoma.
• Further research is needed to clarify the long-term benefits of CME, especially for right colectomies.