Acquired Von Willebrand Syndrome, also known as acquired von willebrand disease, is related to myeloproliferative neoplasm and hypothyroidism. An important gene associated with Acquired Von Willebrand Syndrome is VWF (Von Willebrand Factor), and among its related pathways/superpathways are Infectious disease and Response to elevated platelet cytosolic Ca2+. The drugs Arginine and Vasopressins have been mentioned in the context of this disorder. Affiliated tissues include heart and bone marrow, and related phenotypes are prolonged prothrombin time and hematological neoplasm