Hereditary Angioedema, also known as hereditary angioneurotic edema, is related to angioedema, hereditary, 3 and angioedema, hereditary, 1. An important gene associated with Hereditary Angioedema is F12 (Coagulation Factor XII), and among its related pathways/superpathways are Metabolism of proteins and Response to elevated platelet cytosolic Ca2+. The drugs Metronidazole and Vancomycin have been mentioned in the context of this disorder. Affiliated tissues include skin and tongue, and related phenotypes are Increased shRNA abundance (Z-score > 2) and homeostasis/metabolism