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Table 1 Classification of angioedema

From: Isolated angioedema of the bowel due to C1 esterase inhibitor deficiency: a case report and review of literature

Hereditary Acquired Idiopathic
HAE-I AAE-I Nonhistaminergic
Estrogen dependent (HAE-III) Sex hormone dependent  
  Drug induced (ACE-I, ARB)  
  1. HAE = hereditary angioedema, AAE = acquired angioedema, ACE = angiotensin converting enzyme, ARB = angiotensin receptor blocker.