The bleeding features of AHA are different from those of congenital hemophilia A.[14] In most cases of AHA, including the current patient, FVIII inhibitors lead to hemorrhage in the skin and mucous membranes, gastrointestinal bleeding, urinary tract bleeding, retroperitoneal bleeding, whereas hemarthrosis, a predominant characteristic of congenital FVIII defect, is not common. This evidence concerns the gene F8 and autoimmune hemolytic anemia.