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Angioedema and systemic lupus erythematosus--a complementary association?
Manjari Lahiri1, Anita Y N Lim
1Department of Medicine, Division of General Medicine and Rheumatology, National University Hospital, Singapore. manjari_lahiri@nuh.com.sg
Annals of the Academy of Medicine, Singapore
|March 17, 2007
Summary
Systemic lupus erythematosus (SLE) can present as angioedema, a rare but serious condition. Early diagnosis and management are crucial for patients experiencing swelling, especially with airway compromise.
Area of Science:
- Rheumatology
- Immunology
- Genetics
Background:
- Systemic lupus erythematosus (SLE) is a chronic autoimmune disease.
- Angioedema is a rare but potentially life-threatening manifestation of SLE.
- Acquired angioedema (AAE) can be associated with underlying conditions.
Observation:
- A patient presented with delayed angioedema diagnosis, initially manifesting as limb and facial swelling.
- Acute upper airway compromise prompted further investigation.
- Allergic and hereditary angioedema were excluded, leading to suspicion of AAE.
Findings:
- The patient's clinical and laboratory features, following suspected AAE possibly triggered by infection, led to an SLE diagnosis.
- Management involved high-dose steroids and immunosuppressants.
- The patient achieved remission with no angioedema recurrence.
Implications:
- AAE, caused by C1 inhibitor deficiency, has known associations with lymphoproliferative disorders and anti-C1 INH antibodies.
- This case highlights the importance of considering SLE in the differential diagnosis of AAE.
- Recognizing angioedema as an SLE presentation can improve diagnostic timelines and patient outcomes.
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