The evaluation of von Willebrand's disease begins with a history and physical examination.

The physical examination in someone with von Willebrand's disease is usually normal.

Physical findings in someone with von Willebrand's disease include:

• Excessive bruising

Tests are necessary to confirm the diagnosis of von Willebrand's disease.

Tests that may be used to evaluate von Willebrand's disease include:

• Bleeding time
• Complete blood count
• Factor VIII level
• Partial thromboplastin time (aPTT)
• Prothrombin time (PT)
• Platelet count
• Ristocetin cofactor (RCoF) activity
• Von Willebrand's factor antigen (vWF:Ag)