See also: [[Intussusception]], [[Sigmoid volvulus|sigmoid volvulus (adults)]], [[Vomiting]] Begins with congenital malrotation of midgut Presentation: - usually <2 months with bilious vomiting and some abdo distension - loss of appetite, aponea, constipation - plain abdo films noon-diagnosis → may habe distended bubble of air in stomach and proximal duodenum with otherwise gasless abdo - need **upper Gi study** → ==bird-beak sign== (contrast in a spiral in duodenum Tx/ fluid/electrolyte tx surgery