Fig. 4

Representative imaging scans of a 2-year-old male patient presenting vomiting and abdominal pain. A: Congenital malrotation of the intestine with midgut volvulus was observed. The cross-sectional color doppler ultrasound image visualizing a clockwise twisting of the superior mesenteric vein (SMV) around the superior mesenteric artery (SMA) at the center of the intestinal twist, and a target ring of an isoechoic mass (white arrow). B: CDFI showed a swirling sign centered on the SMA with red and blue blood flow signals. Congenital malrotation of the intestine with midgut volvulus was postoperative confirmed. The greater omentum and the distal mesentery were tightly adherent to form a bundle of intraperitoneal hernia.