Hemarthrosis secondary to congenital or systemic coagulopathies was excluded, as the patient had no prior bleeding history and laboratory studies (prothrombin time, fibrinogen, platelets, liver function tests) were normal, making congenital hemophilia, von Willebrand disease, or consumptive coagulopathy unlikely [6]. Here, F2 is linked to platelet-type von Willebrand disease.