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Related Experiment Videos

Prekallikrein (Fletcher factor) deficiency.

D G Sollo, A Saleem

    Annals of Clinical and Laboratory Science
    |July 1, 1985
    PubMed
    Summary

    Hereditary prekallikrein (Fletcher factor) deficiency, often found incidentally, typically presents with normal coagulation and no bleeding. This autosomal recessive condition, affecting mostly Black individuals, may rarely lead to thrombosis.

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    Area of Science:

    • Hematology
    • Coagulation Science
    • Genetics

    Background:

    • Prekallikrein (Fletcher factor) deficiency is a rare inherited disorder affecting blood coagulation.
    • It is characterized by prolonged activated partial thromboplastin time (aPTT) that corrects with contact activation.

    Observation:

    • Review of 30 cases (1 new, 29 reported) of hereditary prekallikrein deficiency.
    • Patients exhibit significantly reduced prekallikrein levels (<2% of normal).
    • Coagulation profiles are generally normal, with no significant bleeding tendency.

    Findings:

    • Hereditary prekallikrein deficiency follows an autosomal recessive inheritance pattern.
    • Increased consanguinity observed in affected families.
    • Acquired prekallikrein deficiency exists, with largely unknown clinical significance.

    Implications:

    • Hereditary prekallikrein deficiency is typically asymptomatic, with laboratory findings being incidental.
    • Both hereditary and acquired forms may rarely be associated with thrombotic events.
    • Understanding prekallikrein's role is crucial for diagnosing and managing coagulation disorders.

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