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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 nuchal edema
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Accession:HP:0034250 term browser browse the term
Definition:Nuchal edema is considered present in a fetus at gestational week 14 or more if in the midsagittal plane of the neck, there is subcutaneous edema that produces a characteristic tremor on ballotment of the fetal head. This constitutes the severe end of the spectrum of increased nuchal fold thickness, which is defined as soft-tissue thickening of 6 mm or more, seen in the suboccipitobregmatic view of the fetal head. Nuchal edema may be confined to the neck or it may be generalized, as part of hydrops fetalis.
Comment:In the fetus fluid collects behind the neck, much like it does in dependent ankle edema in later life. This occurs partly because of the tendency for the fetus to lie on its back and partly because of the laxity of the skin of the neck. As with ankle edema this accumulation of fluid can represent the end point of several pathological processes, including heart failure. Fluid collecting behind the neck can be detected as nuchal translucency by ultrasound scanning, and it can be measured. The more fluid that has accumulated, the greater the risk of an abnormality being present.


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of prenatal development or birth 0
        Fetal anomaly 0
          Abnormal fetal morphology 0
            Fetal neck anomaly 0
              Fetal nuchal edema 0
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