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The Editor recommends this issue's articles to the reader

Local allergic rhinitis (LAR) is a subgroup of non-allergic rhinitis (NAR) with positive response to nasal allergen provocation test (NAPT) and/or local synthesis of specific IgE (sIgE). Several studies investigated the prevalence and clinical characteristics of this entity in adults. In children, very few data of the prevalence and characteristics of LAR were reported. In this study, Buntarickpornpan et al. (1) studied 54 NAR children (60% male, mean age 11.1 years) and 2 AR control patients. A NAPT with Dermatophagoides pteronyssinus extract (NAPT-Dp) at different concentrations was performed. The immediate response was assessed using the clinical symptoms score, peak nasal inspiratory flow (PNIF), and acoustic rhinometry (ARM). The nasal tryptase and sIgE-Dp were measured at baseline, 15 min and 1 hr after a positive NAPT-Dp. NAPT-Dp was positive in 3.7% of NAR children who had increased symptoms score and decreased minimal cross-sectional area (MCA) on ARM as well as PNIF. However, there was no change in the nasal tryptase and sIgE-Dp which could be due to the dilutional effect of the nasal lavage. The control AR patients had positive NAPT-Dp and increased nasal tryptase at 15 min without the change of sIgE-Dp. The low proportion of LAR in this study indicates that LAR is an uncommon condition in children. However, further study in a large population of children with NAR is needed to explore the prevalence and natural history of LAR in children.