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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:Ring fibers
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Accession:HP:0100305 term browser browse the term
Definition:Ring fibers are formed by a bundle of peripheral myofibrils which are circumferentially oriented such that they encircle the internal portion of the sarcoplasm which is normal in structure and orientation.
Synonyms:exact_synonym: Ring fibres
 xref: SNOMEDCT_US:47913008;   UMLS:C0333770

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  Human phenotype 14815
    Phenotypic abnormality 14812
      Abnormality of the musculoskeletal system 4083
        Abnormality of the musculature 2920
          Abnormal skeletal muscle morphology 1852
            Abnormal muscle fiber morphology 251
              Ring fibers 0
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