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Subacute (acute, persistent) thrombotic microangiopathy.

E G Taft, B B Carver

    Journal of Clinical Apheresis
    |January 1, 1992
    PubMed
    Summary
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    This study reviews patients with prolonged thrombotic microangiopathy requiring extensive plasma support for over three months, achieving complete remission. This distinct subset of thrombotic microangiopathy differs from typical acute courses.

    Area of Science:

    • Hematology
    • Internal Medicine
    • Pathology

    Background:

    • Thrombotic microangiopathy (TMA) encompasses disorders characterized by microangiopathic hemolytic anemia, thrombocytopenia, and organ damage.
    • Typical acute courses of thrombotic thrombocytopenic purpura (TTP) resolve within 3-6 weeks.
    • Chronic relapsing TMA patterns can present with variable acute phases.

    Purpose of the Study:

    • To describe a distinct subset of thrombotic microangiopathy with prolonged acute disease courses.
    • To characterize the treatment requirements and outcomes of these patients.

    Main Methods:

    • Retrospective review of six patients with thrombotic microangiopathy.
    • Analysis of disease duration, plasma support requirements, and remission status.

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    Main Results:

    • All six patients experienced prolonged acute courses requiring plasma support exceeding three months.
    • Prodigious plasma support was necessary, with some patients undergoing over 100 plasma exchanges.
    • All patients achieved complete remission following intensive treatment.

    Conclusions:

    • A distinct subset of thrombotic microangiopathy characterized by prolonged acute phases exists.
    • These patients require extensive plasma support for extended periods, differentiating them from typical TTP presentations.
    • Complete remission is achievable in this subset with intensive management.