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[Allergic vasculitis caused by food allergy].
A Eisenmann1, J Ring, D von der Helm
1Dermatologische Klinik und Poliklinik, Ludwig-Maximilians-Universität München.
Summary
Allergic reactions to specific foods can trigger leukocytoclastic vasculitis (LCV). Identifying and avoiding these food allergens, alongside cromoglycate treatment, significantly improved patient symptoms and LCV lesions.
Area of Science:
- Immunology
- Dermatology
- Allergy
Background:
- Leukocytoclastic vasculitis (LCV) is a small-vessel vasculitis often associated with immune complex deposition.
- The role of food allergies in the pathogenesis of LCV is not fully understood.
- Investigating potential triggers for LCV is crucial for effective patient management.
Observation:
- Two patients with LCV exhibited allergic reactions to specific foods.
- Intracutaneous testing with food allergens induced immediate and delayed inflammatory responses.
- Delayed reactions showed histological and immunopathological features consistent with LCV.
Findings:
- Controlled oral food challenges exacerbated existing petechial lesions in patients.
- Histopathological analysis confirmed LCV characteristics in delayed skin reactions.
- Specific food allergens were identified as clinically relevant triggers for LCV in these cases.
Implications:
- This study highlights the importance of considering food allergies in patients with LCV.
- Diagnostic strategies for LCV should include thorough allergy assessments.
- Dietary avoidance and potential anti-allergic therapies like cromoglycate may be beneficial for managing LCV.