Congenital Abnormality
cleft lip Audio
cleft lip
Subclass of:
Mouth Abnormalities; Lip Diseases
Definitions related to cleft upper lip:
  • (cleft lip) A congenital abnormality consisting of one or more clefts (splits) in the upper lip, which may be accompanied by a cleft palate; it is the result of the failure of the embryonic parts of the lip to fuse.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • (cleft lip) Congenital defect in the upper lip where the maxillary prominence fails to merge with the merged medial nasal prominences. It is thought to be caused by faulty migration of the mesoderm in the head region.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • A gap in the upper lip. This is a congenital defect resulting from nonfusion of tissues of the lip during embryonal development.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2021
  • Chinese physicians were the first to describe the technique of repairing cleft lip. The early techniques involved simply excising the cleft margins and suturing the segments together.
    Medscape
    WebMD, 2019
  • Cleft lip, relatively common congenital deformity in which the central to medial upper lip fails to fuse properly during the second month of prenatal life, resulting in a fissure in the lip beneath the nostril. Once colloquially known as harelip, cleft lip may be unilateral or bilateral. It may...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2020
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