VWF and von Willebrand disease 1: Herein, we describe the case of a pediatric patient who was suspected of having type 1 VWD pre-tonsillectomy, in which anesthetic management was successfully achieved via plasma-derived factor VIII concentrate containing VWF (Confact F®; KM Biologics Co., Ltd., Kumamoto, Japan) during the operation instead of preoperative desmopressin, which has been recommended for the prevention of postoperative bleeding in patients with type 1 VWD [9–11].