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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:Pseudoexfoliation
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Accession:HP:0012627 term browser browse the term
Definition:Deposition of fibrillar material that can be found on all anterior segment structures bathed by aqueous humor.
Comment:In the eye, pseudoexfoliation syndrome is characterized by the deposition of fibrillar material that can be found on all anterior segment structures bathed by aqueous humor. PXM can be observed in vivo during slit lamp examination. It appears as 'dandruff-like' material in the anterior chamber or most characteristically on the anterior lens capsule deposited in a double concentric ring pattern. The rings are separated by a clear zone presumably created because of the movement of the iris on the anterior lens surface. The central ring is located at the area of the iris sphincter, while the peripheral ring is only visible after pupil dilation. PXM is also often observed by slit lamp examination at the pupillary margin, on the lens zonules and on the trabecular meshwork. The site of production of this material which is a complex of various glycoproteins is unclear, but PXM can potentially originate from the iris, lens epithelium, ciliary body, or the trabecular meshwork.
Synonyms:xref: UMLS:C4022815


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the eye 0
        Abnormal eye morphology 0
          Abnormal anterior eye segment morphology 0
            Pseudoexfoliation 0
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