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[Von Willebrand's syndrome (author's transl)]
Nouvelle Revue Francaise D'Hematologie; Blood Cells
|January 1, 1977
Summary
Von Willebrand disease exhibits heterogeneity with quantitative and qualitative defects. This study confirms variations in Willebrand factor levels and activity in patients.
Area of Science:
- Hematology
- Genetics
Context:
- Von Willebrand disease diagnosis relies on bleeding time, factor VIII coagulant activity (VIII:C), Willebrand factor activity (VIIR:WF), and factor VIII-related antigen (VIIR:AG).
- The disease presents with diverse clinical manifestations, indicating underlying genetic heterogeneity.
Purpose:
- To confirm the heterogeneity of von Willebrand disease (vWD) by analyzing quantitative and qualitative defects.
- To investigate the relationship between plasma protein levels and clinical presentation in vWD patients.
Summary:
- This study of 48 patients from 25 families confirms the heterogeneity of von Willebrand syndrome, encompassing both quantitative and qualitative defects.
- Classical vWD involves a quantitative decrease in Willebrand factor, with severe and moderate forms observed. Very severe cases may suggest homozygosity.
- Variants of vWD are characterized by discrepancies between factor VIII-related antigen (VIIR:AG) and Willebrand factor activity (VIIR:WF) levels, indicating qualitative abnormalities.
Impact:
- Highlights the complex nature of von Willebrand disease, necessitating tailored diagnostic and therapeutic approaches.
- Contributes to a better understanding of the genetic basis and clinical spectrum of von Willebrand disease.
- Emphasizes the importance of comprehensive laboratory assessment, including immunoradiometric assays and electrophoresis, for accurate vWD diagnosis and classification.