Congenital Abnormality
microstomia
Subclass of:
Mouth Abnormalities
Etymology:
Greek mikros = small + stoma = mouth
Definitions related to microstomia:
  • A congenital defect in which the mouth is unusually small. (Dorland, 27th ed)
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
  • (narrow mouth) Distance between the commissures of the mouth more than 2 SD below the mean. Alternatively, an apparently decreased width of the oral aperture (subjective).
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Definition and history Microstomia is the term used to describe a congenital or acquired reduction in the size of the oral aperture that is severe enough to compromise cosmesis, nutrition, and quality of life. In recent years, the development of improved surgical reconstructive techniques, particularly the transfer of regional flaps and...
    Medscape
    WebMD, 2025
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