JAMA Clinical Reviews Diagnosis and Treatment of Chronic Spontaneous Urticaria
Sep 26, 2024
Pavel Kolkhir, MD, an expert in chronic spontaneous urticaria, teams up with Karen E. Lasser, MD, MPH, a JAMA Senior Editor, to unpack this puzzling condition. They delve into its prevalence and varied symptoms, from itchy wheals to angioedema. The conversation touches on crucial distinctions between autoimmune and autoinflammatory diseases. They also reveal effective treatment strategies, emphasizing the importance of second-generation antihistamines and advanced options like Omalizumab. The impact on patients' quality of life, including psychological challenges, is also explored.
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Basic Laboratory Tests to Order
- Check complete blood count with differential, erythrocyte sedimentation rate, and C-reactive protein initially.
- Use these tests to identify infections or autoimmune endotypes and guide further evaluation.
Autoimmune Endotypes Explained
- Chronic spontaneous urticaria has autoimmune endotypes: Type I with IgE autoantibodies against self-antigens and Type IIb with IgG autoantibodies against IgE receptors.
- These autoantibodies activate mast cells causing symptoms without external allergens.
Avoid Unnecessary Food Allergy Testing
- Food allergy is extremely rare as a cause of chronic spontaneous urticaria and should not be routinely tested.
- Most cases are idiopathic or autoimmune; focus on evidence-based diagnostic workup rather than extensive food allergy testing.