Keywords : appendiceal abscess, appendicitis, appendicolith, bowel wall thickness, color Dopper, Crohn’s disease, duodenal atresia, duodenal duplication cyst, duodenal obstruction, duplication cyst of GI tract, free air, gangrenous appendix, HPS, hyperemia, hypertrophic pyloric stenosis, IBD, ileocolonic intussusception, inflammatory bowel disease, inguinal hernia, intestinal rotation, Intussusception, meconium ileus, meconium pseudocyst, mesenteric whirlpool, mesoappendix, microcolon, midgut malrotation, NEC, necrotizing enterocolitis, neonatal bowel obstruction, pediatric ultrasound, PEDIATRIC, pelvic abscess, perforated bowel, perforated intestine, peritoneal abscess, pneumatosis intestinalis, portal vein air, pseudokidney sign, pylorospasm, retrocecal appendix, SMA, small bowel intussusception, SMV, subhepatic abscess, superior mesenteric artery, superior mesenteric vein, tip appendicitis, volvulus