Case Presentation: 16-month-old boy with developmental delay, anal atresia, lipomyelomeningocele, and tethered cord syndrome transferred to a tertiary care center for recurrent postprandial blood-streaked emesis and failure to thrive. His past surgical history was remarkable for anorectoplasty. On admission to the outside hospital, his laboratory values were consistent with dehydration, hemoconcentration & hypokalemia. Stool occult [...]