Newborn who had a cyst in their left upper quadrant on prenatal ultrasound Pediatric Imaging Gastrointestinal August 12, 2026April 25, 2026 Transverse (above) and sagittal (below) US of the left upper quadrant of the abdomen shows a large round anechoic lesion anterior to the stomach. The inner layer of the lesion is hyperechoic (echogenic rim sign). The diagnosis was gastric duplication. Related Published August 12, 2026April 25, 2026