Abstract
Transplantation-associated thrombotic microangiopathy (TMA) is one of the main complications after hematopoietic stem cell transplantation (HSCT). At the time of onset of gut TMA, a patient developed a high titer of an inhibitor of the non-immunoglobulin G type to ADAMTS13, which physiologically hydrolyzes von Willebrand factor to control spontaneous intravascular thrombus formation. The patient developed symptoms of myositis, a disorder that has occasionally been reported to manifest after HSCT and to resemble some idiopathic autoimmune diseases. However, a muscle biopsy specimen presented pathologic findings of TMA, including microvascular platelet thrombus formation, without inflammatory lymphocyte infiltration. ADAMTS13 activities returned to normal after steroid treatment, and the improvement of TMA symptoms followed. This patient appears to represent a rare case of post-HSCT TMA associated with the development of an ADAMTS13 inhibitor.
Publication types
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Case Reports
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Research Support, Non-U.S. Gov't
MeSH terms
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ADAM Proteins / antagonists & inhibitors*
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ADAM Proteins / blood
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ADAM Proteins / immunology
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ADAMTS13 Protein
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Adult
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Anti-Inflammatory Agents / administration & dosage
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Autoimmune Diseases / blood*
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Autoimmune Diseases / drug therapy
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Autoimmune Diseases / etiology
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Autoimmune Diseases / immunology
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Autoimmune Diseases / pathology
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Blood Coagulation Factor Inhibitors / blood*
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Blood Coagulation Factor Inhibitors / immunology
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Hematopoietic Stem Cell Transplantation*
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Humans
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Lymphoma, Non-Hodgkin / blood*
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Lymphoma, Non-Hodgkin / complications
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Lymphoma, Non-Hodgkin / immunology
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Lymphoma, Non-Hodgkin / pathology
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Lymphoma, Non-Hodgkin / therapy
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Male
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Methylprednisolone / administration & dosage
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Thrombosis / blood*
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Thrombosis / drug therapy
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Thrombosis / etiology
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Thrombosis / immunology
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Thrombosis / pathology
Substances
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Anti-Inflammatory Agents
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Blood Coagulation Factor Inhibitors
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ADAM Proteins
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ADAMTS13 Protein
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ADAMTS13 protein, human
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Methylprednisolone