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[ACQUIRED HEMOPHILIA A AND THE TIMING OF IMMUNOMODULATORY THERAPY].

INTRODUCTION
Acquired hemophilia A is an autoimmune disease affecting men and women equally and is idiopathic in 50% of the cases. As the mortality rate reaches 50%, prompt diagnosis and treatment are needed. Diagnosis is made in a patient with a bleeding manifestation and prolonged PTT (partial thromboplastin time) that is not corrected in a mixing study with normal plasma. The level of antibodies in the plasma is measured by Bethesda units and a level above 5 units is considered high. Patients with a high titer of antibodies are treated with factor VIII, prothrombin complex, recombinant factor VIIa and tranexamic acid, in combination with immunomodulatory therapy, including steroids, cyclophosphamide, rituximab and immunoglobulins. The timing of rituximab therapy remains debatable. To date, it has not been established whether to use it as a first-line or second-line therapy. According to the currently available literature that relies on a database, the use of rituximab as a first-line modality increased survival without increasing the rate of infections, compared to steroids alone or steroids combined with cyclophosphamide. The current article describes a 79-year old woman who presented with diffuse hematomas in the limbs. A rapid diagnosis and treatment, including factor VIII, tranexamic acid, steroids, cyclophosphamide and rituximab as a first-line therapy, facilitated her complete recovery at a one-year follow-up.