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Acquired C1-inhibitor deficiency: a case report.
1SOS Dipartimentale di Allergologia ASL AL, Novi Ligure (AL), Italy.
European Annals of Allergy and Clinical Immunology
|October 25, 2012
Summary
Acquired angioedema (AAE), a rare condition often linked to lymphoproliferative disorders, can be life-threatening if misdiagnosed. Early recognition in adults with angioedema is crucial for timely and effective treatment.
Area of Science:
- Immunology
- Hematology
Background:
- C1-inhibitor deficiency can manifest as hereditary angioedema (HAE) or acquired angioedema (AAE).
- Acquired angioedema (AAE) is rare, potentially underdiagnosed, and typically presents after age 40, often associated with lymphoproliferative disorders.
Observation:
- A 74-year-old woman experienced recurrent upper airway angioedema episodes with a delayed diagnosis.
- A concurrent diagnosis of B cell leukemia was made in the patient.
Findings:
- Delayed diagnosis of AAE increases the risk of severe, life-threatening episodes.
- AAE episodes in this case were unresponsive to standard angioedema therapies.
Implications:
- Adult-onset angioedema warrants consideration of AAE as a differential diagnosis.
- Thorough clinical history and evaluation of clinical features are essential for diagnosing AAE.
- Prompt recognition and diagnosis of AAE are critical to prevent severe complications and ensure appropriate management.
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