IgE-independent (pseudoallergic) reactions to food and food ingredients are common in a subgroup of adult patients with chronic urticaria, who have daily spontaneous occurrence of wheals. However, for children with chronic urticaria (duration longer than 6 weeks, no physical influence), no data on the importance of pseudoallergen-induced chronic urticaria are available. Therefore, we investigated the role of nonallergic hypersensitivity to food in all children seen with chronic continuous urticaria in our two clinics over the last 2 years (n = 16).
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