Food-induced anaphylaxis and oral allergy syndrome.

Case Report A 16-year-old boy presents to the allergy clinic with complaints of perioral itching and tingling after handling apples at his father’s fruit stall. He had experienced such symptoms on previous occasions, but this time he has developed mild lip swelling and tongue itching, as well. He has a history of seasonal allergic rhinitis that is controlled by nasal steroid spray. His father is concerned that the reaction might be due to pesticides. A skin prick test with fresh apples gives a positive response that confirms the clinical diagnosis of oral allergy syndrome (OAS).