Supplementary Atlas Figure Legend

Figure 1A: Full-colour axial slice from the male data set in the VHP showing the confluence (flexure) between the small intestinal mesentery and right mesocolon.

Figure 1B: Axial CT slice from the male data set in the VHP, and corresponding in level to that seen in (A).

Figure 1C: Schematic outline of contiguity between the small intestinal mesentery and right mesocolon superimposed on (A).

Figure 1D: Schematic outline of contiguity between the small intestinal mesentery and right mesocolon superimposed on (C).

Figure 2A: Full-colour axial slice from the male data set in the VHP showing the confluence (flexure) between the right and transverse mesocolon. As there is no specific boundary between mesenteric regions, the overlap between mesentery directly associated with the right mesocolon, with mesentery associated with the transverse mesocolon, represents the confluence (flexure).

Figure 2B: Axial CT slice from the male data set in the VHP, and corresponding in level to that seen in (A).

Figure 2C: Schematic outline of contiguity between the right and transverse mesocolon superimposed on (A).

Figure 2D: Schematic outline of contiguity between the right and transverse mesocolon superimposed on (C).

Figure 3A: Full-colour axial slice from the male data set in the VHP showing the right mesocolon.

Figure 3B: Axial CT slice from the male data set in the VHP, and corresponding in level to that seen in (A).

Figure 3C: Schematic outline of the right mesocolon superimposed on (A).

Figure 3D: Schematic outline of the right mesocolon superimposed on (C).

Figure 4A: Coronal CT slice demonstrating confluence between the transverse and left mesocolon (i.e., splenic flexure).

Figure 4B: Schematic regions superimposed to demonstrate regional mesenteric anatomy at the splenic flexure; yellow – transverse mesocolon, green – left mesocolon, red – small intestinal mesentery.

Figure 5A: Full-colour axial slice from the male data set in the VHP showing the left mesocolon.

Figure 5B: Axial CT slice from the male data set in the VHP, and corresponding in level to that seen in (A).

Figure 5C: Schematic outline of the left mesocolon superimposed on (A).

Figure 5D: Schematic outline of the left mesocolon superimposed on (C).

Figure 6A: Full-colour axial slice from the male data set in the VHP showing the mesorectum, mesosigmoid and junction between both.

Figure 6B: Axial CT slice from the male data set in the VHP, and corresponding in level to that seen in (A).

Figure 6C: Schematic outline of the mesorectum (red), mesosigmoid (yellow) and the flexural junction between both (green) (A).

Figure 6D: Schematic outline of the mesorectum (red), mesosigmoid (yellow) and junction between both (green) (C).

Figure 7: Normal axial CT image of the ileocaecal mesenteric flexure demonstrating ileocolic vessels within the right mesocolon.

Figure 8: Normal axial CT image demonstrating the ileocolic vessels within the non-flexural region of the right mesocolon.

Figure 9: Normal coronal CT image demonstrating the ileocolic vessels within the flexural and non-flexural regions of the right mesocolon.

Figure 10: Normal axial CT image of the hepatic mesenteric flexure demonstrating the middle colic vessels within the transverse mesocolon

Figure 11: Two normal axial CT images demonstrating vasculature within the hepatic mesenteric flexure.

Figure 12: Normal axial CT image demonstrating the middle colic vessels within the transverse mesocolon.

Figure 13: Normal axial CT image demonstrating the middle colic vessels within the hepatic mesenteric flexure.

Figure 14: Normal coronal CT image demonstrating the left colic vessels within the transverse mesocolon, splenic flexure and left mesocolon.

Figure 15: Normal coronal CT image demonstrating the left colic vessels within the transverse mesocolon, splenic flexure and left mesocolon.

Figure 16: Normal coronal CT image demonstrating the middle and left colic vessels within the transverse colon, splenic flexure and left mesocolon.

Figure 17A: Normal axial CT image demonstrating the left colic vessels within the non-flexural region of the left mesocolon.

Figure 17B: Normal axial CT image demonstrating the left colic vessels within the non-flexural region of the left mesocolon

Figure 18A: Normal axial CT demonstrating associated vasculature within the mesosigmoid and sub-mesosigmoidal retroperitoneum.

Figure 18B: Normal axial CT demonstrating associated vasculature within the mesosigmoid and sub-mesosigmoidal retroperitoneum.

Figure 19: Normal axial CT image demonstrating mesosigmoidal vasculature within the rectosigmoid mesenteric flexure.