Annular pancreas is a rare condition. The exact number of people born with it is unknown. Healthcare providers may diagnose the defect in babies, even before birth. Sometimes, however, it is not recognized and diagnosed until after symptoms start. This could be in childhood or even adulthood. In infants and young children, it can cause intolerance to food, vomiting, and abdominal distention. In older children and adults, it can cause similar symptoms and chronic abdominal pain. Most people with annular pancreas don’t have any symptoms.
Annular pancreas is linked with Down syndrome. About one-fourth of people with this condition also have Down syndrome.