Toddler who had a Nissen fundoplication for gastroesophageal reflux a year ago who is now retching with feeding

Upper GI of para-Nissen herniation
AP (left) and lateral (right) images from an upper GI exam show the Nissen fundoplication wrap to be intact around the fundus of the stomach. However, part of the stomach has herniated above the level of the wrap.

The diagnosis was Nissen fundoplication malfunction in the form of a para-Nissen herniation.