METHODS: A 42-year-old female presenting with facial edema, dyspnea and urticaria after ingested half teaspoon of flaxseed flour 30 minutes previously.
METHODS: A skin prick test for heated flaxseed flour extract showed negative responses, but intradermal test showed positivity which suggested an Immunoglobulin E-mediated reaction.
METHODS: The patient was instructed to avoid future ingestion of flaxseed.
RESULTS: The patient had no recurrence of symptoms at 1-year follow-up.
CONCLUSIONS: This is the first case of flaxseed-induced anaphylaxis in Korea, confirmed by an intradermal skin test.