Congenital Abnormality
thyroid agenesis
[ thahy-roid ey-jen-uh-sis ]
Definitions related to thyroid agenesis:
  • (athyreosis) A rare form of thyroid dysgenesis characterized by complete absence of thyroid tissue that results in primary congenital hypothyroidism, a permanent thyroid deficiency that is present from birth.
    OrphaNet
    INSERM, 2021
  • Absence of the thyroid gland.
    NICHD Pediatric Terminology
    U.S. National Cancer Institute, 2021
  • The congenital absence of the thyroid gland.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • (congenital thyroid gland aplasia) Absence of the thyroid gland in a newborn.
    NCI
    U.S. National Cancer Institute, 2021
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