Superior Mesenteric Vein-First Approach to Robotic Complete Mesocolic Excision for Right Colectomy: Technique and Preliminary Outcomes.

INTRODUCTION

There is growing evidence supporting complete mesocolic excision as the optimal surgical approach for right-sided colon cancer to improve oncologic outcomes in comparison with conventional surgical resection. Although the feasibility of a minimally invasive approach to complete mesocolic excision has been reported, obesity has been associated with increased difficulty for finding the correct plane for dissection and delineating the vascular anatomy. We describe a novel approach with early identification of and dissection along the superior mesenteric vein during robotic complete mesocolic excision surgery, for all patients, regardless of BMI.

TECHNIQUE: The dissection is initiated with identification of the superior mesenteric vein as the starting point. Then, the vascular dissection is performed along the anterior superior mesenteric vein plane while observing complete mesocolic excision principles. The anterior superior mesenteric vein plane is an optimal and safe dissection plane because there are no anterior tributaries. The ileocolic vein and artery are ligated separately at their junction with the superior mesenteric vein and superior mesenteric artery. The dissection is then continued cephalad along the superior mesenteric vein, identifying additional colic arteries, including the middle colic arterial trunk as well as the venous tributaries to the superior mesenteric vein such as the gastrocolic trunk. The superior right colic vein is then ligated at the gastrocolic confluence and the middle colic vessels are ligated. After the vascular dissection is completed, the colon is then mobilized.

RESULTS

A total of 66 patients received the "superior mesenteric vein-first" approach for robotic colectomy between 2013 and 2018, including 40.9% patients with BMI >30 kg/m. Median lymph node yield was 32 (interquartile range, 25-40). The median distance to the high vascular tie was 12 cm (interquartile range, 7-19). Median estimated blood loss was 33 mL (interquartile range, 25-50). Overall rate of grade ≥3 complications was 3.0%.

CONCLUSIONS

Using the superior mesenteric vein-first approach, robotic complete mesocolic excision for right colectomy can be performed on patients with high or low BMI with excellent short-term oncologic outcomes and acceptable morbidity. See Video Abstract at http://links.lww.com/DCR/A960.