Background: The prevalence of sesame allergy is increasing; strict avoidance is the mainstay of therapy. Lately, sesame oral immunotherapy was presented as an alternative treatment, with a high rate of success. Therefore, data on the natural history and the clinical characteristics of patients with persistent sesame allergy are important for the management of patients with sesame allergy.
Objective: To describe the natural history of patients with sesame allergy and the clinical characteristics of patients with spontaneous resolution of sesame allergy compared with patients with persistent sesame allergy.
Methods: In our retrospective study, electronic health records of patients with sesame allergy diagnosis were reviewed for demographic and clinical data. Statistical analysis of clinical characteristics of patients with spontaneous resolution compared with persistent sesame allergy was performed.
Results: A total of 190 patients with sesame allergy were followed for 3.86 ±4.43 years. Of these patients, 61 (32.1%) had spontaneous resolution of sesame allergy. Patients with mild, early (before the age of 10 months) first sesame allergic reaction, with smaller than 7-mm skin prick test and without concomitant tree nut allergy had better resolution rate (56.1%).
Conclusion: Sesame allergy spontaneously resolved in approximately one-third of our patients and in more than half of the patients with mild first reaction (grade 1) at a young age (<10 months), with small skin prick test (<7 mm) and no concomitant tree nut allergy. Larger prospective studies with longer follow-up period are needed to better characterize the sesame allergic patients with persistent allergy who may need oral immunotherapy.
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