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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.
Term:Fetal cystic hygroma
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Accession:HP:0010878 term browser browse the term
Definition:The presence during the prenatal period of a cystic mass with multiple septa with multiple, asymmetric, thin-walled cysts near the posterior aspect of the neck. Fetal cystic hygroma can be defined as nuchal translucency with or without septations measuring greater than 3.0 mm. Increased NT refers to a measurement above the 95th centile, and the term is used irrespective of whether the collection of fluid is septated or not, and whether it is confined to the neck or envelopes the whole fetus. After 14 weeks, increased NT usually resolves, but in some cases it evolves into nuchal edema or cystic hygromas.
Comment:Upon ultrasound examination, fetal cystic hygroma presents as a cystic mass with multiple septa with multiple, asymmetric, thin-walled cysts related to the posterior aspect of the neck. Cystic hygromas can range from increased nuchal translucency to thin-walled cystic masses that may become larger than the fetal head. The cysts may result from a lymphatic abnormality, possibly one caused by absent or inefficient connections between the lymphatic and venous systems. Depending on the site, the cut off may vary from site to site. Lowest would be 2.5 mm and highest 3.5 mm.
Synonyms:exact_synonym: Foetal cystic hygroma
 xref: UMLS:C0948242


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of head or neck 0
        Abnormality of the neck 0
          Abnormal neck morphology 0
            Cystic hygroma 0
              Fetal cystic hygroma 0
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