What is (are) Hereditary angioedema ?
Hereditary angioedema (HAE) is an immune disorder characterized by recurrent episodes of severe swelling. The most commonly affected areas of the body are the limbs, face, intestinal tract, and airway. HAE is caused by low levels or improper function of a protein called C1 inhibitor which affects the blood vessels. This condition is inherited in an autosomal dominant pattern.