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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:Facial cleft
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Accession:HP:0002006 term browser browse the term
Definition:A congenital malformation with a cleft (gap or opening) in the face.
Comment:The categories of facial cleft (subterms) correspond to Tessier, P (1976) Classification of rare craniofacial clefts, Journal of Maxillofacial Surgery; 4:69-92. There exists a competing classification system by Van der Meulen that divides different types of clefts based on where the development arrest occurs in the embryogenesis. The HPO uses the Tessier classification because it is based on phenotype rather than pathophysiological considerations.
Synonyms:exact_synonym: Cleft of the face;   Tessier facial cleft
 related_synonym: FACIAL CLEFTS
 xref: SNOMEDCT_US:92821006;   UMLS:C0685787

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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
            Facial cleft 0
              Midline facial cleft + 0
              Orbital cleft + 0
              Paramedian facial cleft + 0
              Transverse facial cleft + 0
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