Von Willebrand disease: an overview

Area of Science:

• Hematology
• Genetics
• Internal Medicine

Background:

• Von Willebrand disease is the most common inherited bleeding disorder.
• It results from quantitative or qualitative defects in von Willebrand factor (VWF).
• VWF is crucial for platelet adhesion and factor VIII stabilization.

Purpose of the Study:

• To provide a comprehensive overview of von Willebrand disease.
• To detail the classification, pathophysiology, diagnosis, and management of the disorder.
• To highlight the importance of VWF multimer analysis for accurate typing.

Main Methods:

• Review of existing literature on von Willebrand disease.
• Analysis of diagnostic criteria including VWF antigen, VWF activity, and FVIII coagulant activity.
• Emphasis on VWF multimer analysis for disease subtyping.

Main Results:

• Von Willebrand disease presents in inherited and acquired forms, with inherited types including Type 1, Type 2 (subtyped 2A, 2B, 2M, 2N), and Type 3.
• Type 1 is most prevalent, characterized by mild mucocutaneous bleeding.
• Type 2 subtypes exhibit varying severity, with Type 2N mimicking hemophilia symptoms.

Conclusions:

• Accurate diagnosis relies on a combination of laboratory tests, considering blood group context.
• VWF multimer analysis is essential for precise classification and guiding therapeutic decisions.
• Management strategies encompass replacement therapy, non-replacement therapy, antifibrinolytics, and topical agents.