Developments in the diagnostic procedures for von Willebrand disease

Area of Science:

• Hematology
• Genetics
• Internal Medicine

Background:

• Von Willebrand disease (VWD) is the most prevalent inherited bleeding disorder.
• VWD diagnosis is challenging due to disease heterogeneity, ranging from mild mucocutaneous bleeding to severe gastrointestinal or joint hemorrhages.
• Bleeding episodes stem from quantitative or qualitative defects in von Willebrand factor (VWF), crucial for platelet adhesion and Factor VIII binding.

Purpose of the Study:

• To review diagnostic procedures for accurate Von Willebrand disease diagnosis and classification.
• To emphasize the importance of precise diagnosis for effective patient treatment and genetic counseling.
• To guide clinicians in selecting appropriate diagnostic assays for VWD subtyping.

Main Methods:

• Initial assessment involves detailed medical and family bleeding history.
• Laboratory investigations include standard hemostasis screening tests.
• Specific assays measure plasma VWF antigen, VWF platelet binding ability, and Factor VIII activity.

Main Results:

• Confirmed VWD cases are subtyped into types 1, 2 (A, B, M, N), or 3.
• Additional tests like VWF propeptide measurement and genetic analysis aid in identifying underlying pathological mechanisms.
• Diagnostic procedures enable accurate classification for tailored treatment strategies.

Conclusions:

• Accurate diagnosis and classification of VWD are essential for appropriate management.
• A systematic diagnostic approach, from history taking to specialized assays, is crucial.
• Understanding VWD subtypes and mechanisms guides therapeutic decisions and patient counseling.