RT Journal Article T1 International recommendations on the diagnosis and treatment of patients with acquired hemophilia A. A1 Huth-Kühne, Angela A1 Baudo, Francesco A1 Collins, Peter A1 Ingerslev, Jørgen A1 Kessler, Craig M A1 Lévesque, Hervé A1 Mingot Castellano, Maria Eva A1 Shima, Midori A1 St-Louis, Jean K1 Acquired hemophilia K1 Bleeding K1 Inhibitors K1 Treatment K1 Recommendations K1 Hemofilia A K1 Hemorragia K1 Tiempo de tromboplastina parcial K1 Tratamiento medicamentoso combinado K1 Cooperación Internacional AB Acquired hemophilia A (AHA) is a rare bleeding disorder characterized by autoantibodies directed against circulating coagulation factor (F) VIII. Typically, patients with no prior history of a bleeding disorder present with spontaneous bleeding and an isolated prolonged aPTT. AHA may, however, present without any bleeding symptoms, therefore an isolated prolonged aPTT should always be investigated further irrespective of the clinical findings. Control of acute bleeding is the first priority, and we recommend first-line therapy with bypassing agents such as recombinant activated FVII or activated prothrombin complex concentrate. Once the diagnosis has been achieved, immediate autoantibody eradication to reduce subsequent bleeding risk should be performed. We recommend initial treatment with corticosteroids or combination therapy with corticosteroids and cyclophosphamide and suggest second-line therapy with rituximab if first-line therapy fails or is contraindicated. In contrast to congenital hemophilia, no comparative studies exist to support treatment recommendations for patients with AHA, therefore treatment guidance must rely on the expertise and clinical experience of specialists in the field. The aim of this document is to provide a set of international practice guidelines based on our collective clinical experience in treating patients with AHA and contribute to improved care for this patient group. PB Ferrata Storti Foundation SN 0390-6078 YR 2009 FD 2009-04 LK http://hdl.handle.net/10668/1204 UL http://hdl.handle.net/10668/1204 LA en NO Huth-Kühne A, Baudo F, Collins P, Ingerslev J, Kessler CM, Lévesque H, et al. International recommendations on the diagnosis and treatment of patients with acquired hemophilia A. Haematologica. 2009; 94(4):566-75 NO Journal Article; Practice Guideline; Research Support, Non-U.S. Gov't; DS RISalud RD Apr 11, 2025