Atypical variant of acquired von Willebrand syndrome in Wilms tumor: is hyaluronic acid secreted by nephroblastoma cells the cause?

Abstract excerpt

Acquired von Willebrand syndrome (AvWS) has been reported in eight children with Wilms tumor (nephroblastoma in four boys and four girls) at a mean age of 3.3 years (range, 0.33-9 years). Only three of eight patients with AvWS in Wilms tumor presented with mild mucocutaneous bleeding symptoms. The AvWS in seven children with Wilms tumor featured either undetectable or very low von Willebrand factor antigen...

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