[Is the DDAVP-test helpful to diagnose children?]

Area of Science:

• Hematology
• Pediatric Medicine
• Diagnostic Testing

Context:

• Diagnosing von Willebrand disease (VWD) in pediatric patients with borderline VWF parameters presents challenges.
• The 'grey area' of VWD makes it difficult to distinguish mild disease from low-normal VWF levels, especially given difficulties in assessing children's bleeding history.

Purpose:

• To evaluate the efficacy of the 1-deamino-8-D-arginine vasopressin (DDAVP) test as a diagnostic tool for VWD in pediatric patients with borderline VWF parameters.
• To determine if DDAVP response correlates with bleeding history in this patient group.

Summary:

• A retrospective analysis of 52 pediatric patients with borderline VWD evaluated the DDAVP test's diagnostic utility.
• While all patients showed a good response to DDAVP, the increase in VWF:Ag, VWF:RiCof, and FVIII:C did not significantly differ between patients with positive and negative bleeding histories.
• The study found no significant association between a positive bleeding history and a lower DDAVP response, nor between a high response and a negative history.

Impact:

• The DDAVP test is not a suitable diagnostic tool for the 'grey area' of VWD in pediatric patients.
• This finding highlights the need for alternative diagnostic strategies for VWD in children with borderline VWF levels.