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Simultaneous deep venous thrombosis and acquired factor VIII inhibitor
Steven R Deitcher1, Teresa L Carman, Kandice Kottke-Marchant
1Department of Cardiovascular Medicine, The Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA. deitchs@ccf.org
Summary
Acquired hemophilia A, a bleeding disorder, can coexist with deep venous thrombosis, a clotting disorder. Early diagnosis and treatment are crucial for managing these life-threatening conditions.
Area of Science:
- Hematology
- Immunology
- Vascular Medicine
Background:
- Acquired hemophilia A (AHA) is a rare immune disorder causing bleeding due to factor VIII autoantibodies.
- Deep venous thrombosis (DVT) is a clotting disorder with risks of pulmonary embolism and post-thrombotic syndrome.
Observation:
- Presents three cases of AHA with prolonged activated partial thromboplastin time (aPTT), bleeding, and coexisting DVT.
- Highlights diagnostic challenges in differentiating bleeding from clotting disorders when aPTT is prolonged.
Findings:
- Autoantibodies in AHA can paradoxically contribute to hypercoagulable states, leading to DVT.
- Lupus anticoagulant can cause prolonged aPTT in thrombotic events, mimicking bleeding disorders.
Implications:
- Emphasizes the need for comprehensive diagnostic workups in patients with unexplained bleeding and prolonged aPTT.
- Suggests a potential mechanism linking autoimmune bleeding disorders with thrombotic events.
- Underscores the critical importance of accurate diagnosis for effective, life-saving therapy in complex hematologic cases.