Toward a new paradigm for the identification and functional characterization of von Willebrand disease

Area of Science:

• Hematology
• Clinical Diagnostics
• Molecular Biology

Background:

• Diagnosing and functionally characterizing von Willebrand disease (VWD) presents significant challenges.
• Clinical uncertainty, limitations in standard laboratory testing, and an ambiguous classification scheme complicate VWD identification and subtyping.
• Current diagnostic approaches for VWD often fall short in providing definitive characterization.

Purpose of the Study:

• To review current perspectives and alternative strategies for the classification and functional characterization of VWD.
• To highlight the utility of an extended core test panel for VWD diagnosis.
• To explore the potential of desmopressin (DDAVP) challenge in VWD assessment.

Main Methods:

• Review of current literature and diagnostic approaches for VWD.
• Evaluation of an extended core test panel including functional von Willebrand factor (VWF) assays like the collagen binding assay.
• Assessment of the desmopressin (DDAVP) challenge test for diagnostic and therapeutic insights.
• Consideration of supplementary assays such as the PFA-100 and VWF propeptide assay post-DDAVP challenge.

Main Results:

• An extended VWF testing panel, incorporating assays like collagen binding, offers improved diagnostic capabilities.
• The desmopressin (DDAVP) challenge can provide therapeutic information and aid in characterizing VWF defects.
• Supplementary assays, including PFA-100 and VWF propeptide, may further enhance VWD characterization after DDAVP administration.

Conclusions:

• Alternative diagnostic strategies are needed to overcome the challenges in VWD classification and functional characterization.
• An extended VWF testing panel and the DDAVP challenge represent promising advancements in VWD diagnosis.
• These improved methods can lead to more precise characterization of individuals with von Willebrand factor deficiencies or defects.