Congenital Abnormality
choanal atresia
Subclass of:
Congenital abnormality of respiratory system; Nose Diseases
Definitions related to choanal atresia:
  • A congenital abnormality that is characterized by a blocked CHOANAE, the opening between the nose and the NASOPHARYNX. Blockage can be unilateral or bilateral; bony or membranous.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Absence or abnormal closure of the choana (the posterior nasal aperture).
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2021
  • Choanal atresia (CA) is a congenital anomaly of the posterior nasal airway characterized by the obstruction of one (unilateral) or both (bilateral) choanal aperture(s), with clinical manifestations ranging from acute respiratory distress to chronic nasal obstruction.
    OrphaNet
    INSERM, 2021
  • Complete nasal obstruction in a newborn may cause death from asphyxia. During attempted inspiration, the tongue is pulled to the palate, and obstruction of the oral airway results.
    Medscape
    WebMD, 2019
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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.