VWF and laryngotracheoesophageal cleft: A recent study shows that out of a sample of 113 patients with LC, 40 had typical symptoms and analysis of serum samples showed persistence, at 6-month follow-up of serological markers of tissue damage and signs of thromboinflammation, characterized by markers of endothelial activation, such as von Willebrand factor (vWF), and red blood cell lysis.