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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:abnormal second pharyngeal arch morphology
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Accession:MP:0006338 term browser browse the term
Definition:any structural anomaly of the second arch which contributes to the development of the stapes, styloid process, hyoid bone, stylohyoid ligament, muscles of facial expression, stapedius muscle, stylohyoid muscle, and lining of the palatine tonsils
Synonyms:exact_synonym: abnormal hyoid arch morphology;   abnormal second branchial arch morphology

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  mammalian phenotype 5370
    craniofacial phenotype 47
      abnormal craniofacial morphology 47
        abnormal craniofacial development 10
          abnormal pharyngeal arch morphology 0
            abnormal second pharyngeal arch morphology 0
              abnormal second pharyngeal arch artery morphology + 0
              absent second pharyngeal arch 0
              small second pharyngeal arch + 0
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