title: Buckwheat anaphylaxis: an unusual allergen in Taiwan.
abstract: IgE-mediated hypersensitivity to buckwheat is common in Korea, Japan, and some other Asian countries. However, buckwheat is not a common allergen in Taiwan. We report a woman with asthma who had anaphylactic shock, generalized urticaria, and an acute exacerbation of asthma five minutes after ingesting buckwheat. The patient underwent skin prick and Pharmacia CAP testing (Uppsala, Sweden) for specific IgE to buckwheat, white sesame and soybean as well as other common allergens in Taiwan including Dermatophagoides pteronyssinus (Dp), D. farinae (Df), cat and dog dander, cockroach, egg white, cow milk and codfish. The patient had a strongly positive skin prick test response to buckwheat and positive reactions to Dp and latex. Specific IgE results were class 6 for buckwheat, class 4 for Dp and Df, and class 2 for dog dander, wheat, sesame and soybean. Results of an open food challenge with white sesame and soybean were negative. Although buckwheat is a rare allergen in Taiwan, it can cause extremely serious reactions and should be considered in patients presenting with anaphylaxis after exposure to buckwheat.
authors.affiliation: Division of Allergy and Immunology, Department of Pediatrics, Mackay Memorial Hospital, Taiwan.
authors.forename: Tsung-Chi
authors.initials: TC
authors.lastname: Wang
authors.forename: Shyh-Dar
authors.initials: SD
authors.lastname: Shyur
authors.forename: Da-Chin
authors.initials: DC
authors.lastname: Wen
authors.forename: Yu-Hsuan
authors.initials: YH
authors.lastname: Kao
authors.forename: Li-Hsin
authors.initials: LH
authors.lastname: Huang
mesh_terms: D000328:Adult; D000485:Allergens / Q000276:immunology*; D000707:Anaphylaxis / Q000175:diagnosis / Q000209:etiology / Q000276:immunology*; D001249:Asthma / Q000209:etiology / Q000276:immunology; D002523:Edible Grain / Q000276:immunology; D019612:Fagopyrum / Q000276:immunology*; D005260:Female; D006801:Humans; D006969:Hypersensitivity, Immediate; D012882:Skin Tests; D013624:Taiwan; D014581:Urticaria / Q000209:etiology / Q000276:immunology
chemical_list: D000485:Allergens