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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

Term:Oral cleft
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Accession:HP:0000202 term browser browse the term
Definition:The presence of a cleft in the oral cavity, the two main types of which are cleft lip and cleft palate. In cleft lip, there is the congenital failure of the maxillary and median nasal processes to fuse, forming a groove or fissure in the lip. In cleft palate, there is a congenital failure of the palate to fuse properly, forming a grooved depression or fissure in the roof of the mouth. Clefts of the lip and palate can occur individually or together. It is preferable to code each defect separately.
Synonyms:exact_synonym: Cleft of the mouth;   Oral clefting
 narrow_synonym: Cleft lip, cleft palate
 related_synonym: Cleft lip/palate
 xref: SNOMEDCT_US:253983005;   SNOMEDCT_US:66948001;   UMLS:C0158646;   UMLS:C4021813

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of head or neck 0
        Abnormality of the head 0
          Abnormality of the face 0
            Abnormality of the mouth 0
              Abnormal oral morphology 0
                Abnormal oral cavity morphology 0
                  Oral cleft 0
                    Cleft lip + 0
                    Cleft maxillary alveolus 0
                    Cleft palate + 0
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