Fig. 4

Intraoperative findings. a Intraoperative identification of the mass (arrow) in the mesocolon lateral to the duodenum. b Visualization of the two polymer clips (arrowheads) attached to the mass (encircled with a dotted line), with the inferior mesenteric artery and root of the left colic artery (arrow) revealed. c Resection of the mass (arrow). d No residual lesion in the area, with the left colic artery (arrowhead) clipped at its origin from the inferior mesenteric artery, and preservation of the gonadal vessel (thin arrow) and ureter (thick arrow). e Illustration depicting the vessel anatomy, clips, and the mass. New clips (drawn in yellow) are applied to the left colic artery and inferior mesenteric vein to excise the mass along with the old clips (drawn in black)