[Complete mesocolic excision during right hemicolectomy]

Area of Science:

• Surgical Oncology
• Gastrointestinal Surgery

Background:

• Complete mesocolic excision (CME) aims to improve oncological outcomes in colon cancer by ensuring complete lymph node removal.
• Right-sided hemicolectomy with CME involves dissecting the superior mesenteric vein, potentially increasing the risk of injury to surrounding organs.
• No randomized studies have compared long-term oncological results of standard right hemicolectomy versus CME.

Purpose of the Study:

• To compare the incidence of complications and specimen characteristics between standard right hemicolectomy and right hemicolectomy with CME.
• To evaluate the oncological safety and feasibility of CME in right-sided hemicolectomy.

Main Methods:

• A retrospective study included 83 patients who underwent right-sided hemicolectomy for colon carcinoma.
• The procedures were divided into standard right hemicolectomy (63 patients) and right hemicolectomy with CME (20 patients).
• Complications, specimen parameters, and lymph node yield were compared between the groups.

Main Results:

• Right hemicolectomy with CME had a longer operative time (average 20 minutes longer) but similar complication rates.
• The CME technique yielded a significantly longer resected colon (median 42 cm vs. 22 cm) and a higher number of removed lymph nodes (median 23 vs. unspecified).
• No significant differences were observed in lymph node metastasis incidence or resected terminal ileum length.

Conclusions:

• Right-sided hemicolectomy with CME removes more lymph nodes than the standard technique, potentially enhancing oncological clearance.
• The central vascular ligation in CME may prolong operation time and carry a risk of intraoperative injuries.
• CME represents an effort to standardize surgical techniques for colon cancer resection.