Blood, blood-forming organs-immune system (D50-D90).
- Histamine-mediated angioedema.
Endocrine, nutritional, and metabolic diseases (E00-E90).
- C1 esterase deficiency – glycoprotein from the serine protease inhibitor group, which has a regulatory effect in the complement system (defense system).
Injuries, poisoning and other consequences of external causes (S00-T98).
- Allergic reactions, unspecified