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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:Hand clenching
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Accession:HP:0001188 term browser browse the term
Definition:An abnormal hand posture in which the hands are clenched to fists. All digits held completely flexed at the metacarpophalangeal and interphalangeal joints. In prenatal sonography of the fetal clenched hand, the index finger overlaps a clenched fist formed by the other digits. The proximal interphalangeal articulation of the index finger is flexed and ulnarly deviated, and the thumb is adducted.
Comment:Hand clenching is commonly characterized by malpositioning of the fingers characterized by radial deviation of the 4th and 5th digits and ulnar deviation of the 2nd digit over the 3rd finger. Hand clenching is distinguished from Camptodactyly, as that term may describe fewer than five digits of a eudactylous hand and does not involve the MCPJ. The digits may overlap when they lie flexed in the palm. It is not necessary to specify the overlapping fingers finding separately.
Synonyms:exact_synonym: Clenched hand;   Clenched hands
 xref: UMLS:C0239815

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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
              Hand clenching 0
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