Last update 08 May 2025

Acquired Angioedema

Basic Info

Synonyms
AAE, Acquired C1 esterase inhibitor deficiency, Acquired C1 esterase inhibitor deficiency (disorder)
+ [20]
Introduction
A rare non-histaminic angioedema characterised by potentially life-threatening episodes of oedema of subcutaneous and/or mucosal tissues without urticaria, caused by excessive consumption of C1 esterase inhibitor (C1-INH) in the context of lymphoproliferative or autoimmune diseases. Patients typically present in the fourth decade of life or later and without a family history of angioedema. Clinical manifestation includes nonpitting oedema of the skin predominantly involving the face, but also the limbs or genitals, as well as abdominal pain due to involvement of the gastrointestinal mucosa and severe oedema of the upper airway and oral mucosa. Laboratory examination shows low C1-INH activity and low C3, C4, and C1q levels. Autoantibodies to C1-INH are frequently detectable.

Analysis

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