Hereditary angioedema type 1 (HAE 1) is a form of hereditary angioedema characterized by acute edema in subcutaneous tissues, viscera and/or the upper airway. The disease is Monarch Disease Ontology term MONDO_0015053 (hereditary angioedema type 1). Also known as: HAE 1, HAE-I, hereditary angioneurotic edema type 1, hereditary angioneurotic oedema type 1.