Diagnosis of von Willebrand disease (VWD) merits consideration of personal and family
history of bleeding symptoms along with confirmatory laboratory testing. As the latter
yields quantifiable results, overreliance on a laboratory diagnosis may occur. However,
existing tests for VWD contain potential sources for error. Both intrinsic and extrinsic
factors affecting these assays can contribute to either falsely normal or falsely
abnormal results. This article will discuss the present available assays as well as
new developments in diagnostic testing. A clear understanding of the limitations of
VWD testing is helpful for ensuring the correct diagnosis of affected patients.
Keywords
von Willebrand factor - von Willebrand disease - bleeding - collagen - platelets