We describe two patients with mild hemophilia A (MHA) who developed high titer inhibitor (HTI) following intensive recombinant factor VIII (rFVIII) concentrate replacement for surgery and trauma. Intranasal desmopressin was instituted shortly following immunosuppressive therapy (IST) and activated prothrombin complex concentrate (APCC) in one case, and following APCC alone in the second case. Avoidance of factor VIII (FVIII) coupled with intranasal desmopressin prophylaxis three times a week resulted in undetectable inhibitor levels. Both patients have had no further bleeding episodes and have been maintained on desmopressin prophylaxis prior to activity for the past 2 to 3 years. Recombinant factor VIIa (rFVIIa) was used successfully prior to a second surgery in one patient without complication.
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