Fig. 4

Images that represent the location of the FSP, SSP, and TSP. a, b The FSP is located between the posterior lobe of the ascending mesocolon and the ARF. Separation of the SSP is shown in (c). d, e The TSP is located between the transverse mesocolon and the dorsal mesogastrium. f The relationship between the FSP, SSP, and TSP is shown. ARF anterior renal fascia, SMV superior mesenteric vein, APDV anterior pancreaticoduedenal vein, FSP first surgical plane, SSP second surgical plane, TSP third surgical plane