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[Angioedema without Urticaria: Medical History and Findings].

Matteo Badini1, Nikolaos Georgitsogiannakos2, Jennifer Angelella3

  • 1Studi medici riuniti e partners, Lugano, Schweiz.

Praxis
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PubMed
Summary

This case study highlights a woman experiencing recurrent angioedema without urticaria. Treatment with steroids and antihistamines was ineffective, suggesting bradykinin-induced swelling, later confirmed as acquired C1-INH deficiency.

Keywords:
AngioedemaAngioödemBradykininC1 inhibitorC1-InhibitorProphylaxeTherapiebradykininprophylaxistherapy

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Area of Science:

  • Immunology
  • Allergy and Clinical Immunology

Background:

  • Angioedema is a swelling of the deeper layers of skin and mucous membranes.
  • Urticaria (hives) often accompanies angioedema, but its absence suggests alternative etiologies.
  • Conventional treatments for histamine-mediated conditions may be ineffective in non-histaminergic angioedema.

Observation:

  • A patient presented with recurrent episodes of angioedema but no urticaria.
  • Systemic steroid and antihistamine therapies provided no relief.
  • The clinical presentation suggested a bradykinin-mediated process rather than histamine.

Findings:

  • Late onset and negative family history raised suspicion for acquired C1-inhibitor (C1-INH) deficiency.
  • Specific hematological tests confirmed the diagnosis of acquired C1-INH deficiency.
  • The patient's condition was attributed to bradykinin-induced angioedema.

Implications:

  • This case underscores the importance of considering bradykinin-mediated angioedema, particularly acquired C1-INH deficiency, in patients unresponsive to standard treatments.
  • Accurate diagnosis is crucial for initiating appropriate prophylaxis and acute attack management.
  • Early identification and management of acquired C1-INH deficiency can significantly improve patient outcomes and quality of life.