Causes of Isolated Angioedema
| Cause | Comment |
|---|---|
| Hereditary angioedema – type I, II and III | 20% arise from spontaneous mutation |
| Acquired angioedema | Associated with lymphoproliferative and autoimmune conditions |
| Drugs | Angiotensin-converting-enzyme inhibitors Non-steroidal anti-inflammatory drugs Oral contraceptives |
| Idiopathic |