Congenital Abnormality
annular pancreas
Definitions related to annular pancreas:
  • A congenital anomaly in which the pancreas completely (or sometimes incompletely) encircles the second portion of duodenum and occasionally obstructs the more proximal duodenum.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • A rare congenital abnormality in which the duodenum is surrounded by a ring of pancreatic tissue. It may result in constriction of the duodenum and feeding intolerance.
    NCI
    U.S. National Cancer Institute, 2021
  • A distinct form of duodenal atresia in which the head of the pancreas forms a ring around the second portion of the duodenum.
    NIH Genetic and Rare Diseases
    National Center for Advancing Translational Sciences
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.