Analysis of the prevalence of subtypes of angioedema without urticaria in a reference center in Rio de Janeiro – Brazil

Background Angioedema is a highly heterogeneous group of conditions and is characterized by sudden, pronounced swelling of the lower dermis and subcutaneous. Because of its frequent coexistence with urticaria, it is often classified in the same manner as urticaria. However, it also includes categories not associated with urticaria. Angioedema without urticaria is characterized by hereditary and acquired angioedema and histaminergic and nonhistaminergic angioedema. The prevalence of subtypes of angioedema without urticaria was estimated at the Clinical Immunology outpatient service of an University Hospital, in Rio de Janeiro.