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Differentiating acute upper airway angioedema is crucial for effective treatment. Mast-cell-mediated angioedema responds to antihistamines and steroids, while bradykinin-mediated angioedema requires specific treatments like C1-esterase inhibitor concentrates.

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Area of Science:

  • Emergency Medicine
  • Allergy and Immunology
  • Pharmacology

Background:

  • Acute upper airway angioedema presents a life-threatening emergency.
  • Distinguishing between mast-cell-mediated and bradykinin-mediated angioedema is critical due to differing treatment strategies.

Purpose of the Study:

  • To review the diagnostic and therapeutic approaches for acute upper airway angioedema.
  • To highlight the importance of differentiating angioedema subtypes for appropriate management.

Main Methods:

  • Selective literature search of PubMed and review of clinical guidelines.
  • Authors' clinical experience integrated into the assessment of available literature.

Main Results:

  • Airway management is the priority in head and neck angioedema.
  • Mast-cell-mediated angioedema (often with urticaria) responds to antihistamines/glucocorticoids; severe cases may need epinephrine.
  • Bradykinin-mediated angioedema (hereditary or acquired, e.g., from ACE inhibitors) requires C1-esterase inhibitor concentrates or bradykinin-2 receptor antagonists.

Conclusions:

  • A coordinated diagnostic and therapeutic strategy is essential for upper airway angioedema.
  • Steroids and antihistamines are effective for mast-cell-mediated angioedema but not bradykinin-mediated angioedema.
  • No approved causal treatment currently exists for ACE inhibitor-induced angioedema.