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The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories ( For more information about these ontologies, see the MGI Publications Page at

Term:left-sided isomerism
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Accession:MP:0000542 term browser browse the term
Definition:anomaly in the asymmetry of the visceral paired organs (e.g. lungs) such that organs on the left and right side have the morphology normally seen on the left side of the body; this may also be associated with the presence of multiple spleens
Synonyms:related_synonym: polysplenia syndrome (left isomerism)
 xref: Fyler:0192;   Fyler:192

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  mammalian phenotype 5415
    growth/size/body region phenotype 826
      heterotaxia 0
        left-sided isomerism 0
          left atrial isomerism 0
          left pulmonary isomerism 0
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