PMC9030358_01
(a) Ultrasound image showing the reverse positional relationship between the superior mesenteric vein and superior mesenteric artery. The superior mesenteric vein is located at the left front of the superior mesenteric artery. (b) Upper gastrointestinal imaging examination showing the corkscrew sign in the duodenum, indicating a spiral curve similar to "apple-peel/twisted ribbon" formed due to midgut volvulus
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F1
The SMV is located at the left front of the SMA [Figure 1a]. An image examination of the UGI showed a corkscrew sign in the duodenum, indicating a spiral curve formed by midgut volvulus, similar to "apple-peel/twisted ribbon" [Figure 1b].
(a and b) Ultrasound image of the mid-section of the upper abdomen showing concentric circular masses
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F2
The ultrasound image of the mid-section of the upper abdomen showed concentric circular masses [Figure 2a and b].
(a and b) Whirlpool signs visualized on color Doppler ultrasound: the small intestine and mesenteric are wrapped around the superior mesenteric artery to form a clockwise whirlpool
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F3
Color Doppler ultrasound demonstrated a typical whirlpool signs [Figure 3a and b].