Figure 6From: Salvage therapy with high dose Intravenous Immunoglobulins in acquired Von Willebrand Syndrome and unresponsive severe intestinal bleeding Plasma levels of anti von Willebrand factor (anti-VWF) autoantibodies expressed as absorbance (Abs) at 492 nm in plasma from the patient with acquired von Willebrand syndrome before and after starting treatment with high dose intravenous immunoglobulin (Ig). The dotted line represents the upper limit of the normal range.Back to article page