Abstract
Recently, several studies have revealed a subset of patients who have positive nasal provocation to allergens despite having a negative skin prick test. It has been hypothesized that these patients have localized allergic rhinitis. However, the prevalence varies greatly, ranging from 0% to 100% of skin test-negative individuals. This wide range in prevalence is likely related to differences in methodology, including differences in allergen manufacturers, concentrations, and numbers of allergens tested and, perhaps most importantly, criteria for a positive nasal challenge. Despite the evidence to date, many challenges exist with regard to the concept of localized nasal allergy. Further studies will be required to further define the immunopathology, prevalence, practical diagnostic tests, and management.
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