VWF and von Willebrand disease type 2A: Simultaneously, a hematology consultation was requested, and hematological tests were performed—von Willebrand factor (vWF) antigen, factor VIII (fVIII), vWF ristocetin cofactor activity (vWF/Rco), and the vWF antigen/Rco ratio—leading to the diagnosis of von Willebrand disease type 2A.