Understanding Hereditary Angioedema with Normal C1 Inhibitor Hereditary angioedema (HAE) is a rare condition defined by recurrent swelling attacks. In cases with a normal C1 esterase inhibitor (C1-INH), the clinical picture and management can differ from classic C1-INH–deficient forms. The latest real-world evidence, drawn from a national HAE network, highlights how certain subtypes—especially HAE with…