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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:Ulnar claw
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Accession:HP:0001178 term browser browse the term
Definition:An abnormal hand position characterized by hyperextension of the fourth and fifth fingers at the metacarpophalangeal joints and flexion of the interphalangeal joints of the same fingers such that they are curled towards the palm.
Comment:An ulnar claw, also known as claw hand, is an abnormal hand position that is associated with lesions of the ulnar nerve. Note that ulnar claw is to be distinguished from ectrodactyly, which also can be referred to as claw hand.
Synonyms:xref: UMLS:C4025799

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of limbs 0
        Abnormality of the upper limb 0
          Abnormality of the hand 0
            Abnormal hand morphology 0
              Ulnar claw 0
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