Abstract
The case history of a 27-year-old man with Matsutake mushroom-dependent anaphylactoid reaction is reported. The patient suffered from general cutaneous erythema, with itching, urticaria angiedema to his face and body, and with inspiratory dyspnea, soon after consuming a meal of Matsutake mushrooms. A challenge test with about 100 g grilled Matsutake mushrooms resulted in irritation of the throat, inspiratory dyspnea and lowering of peak flow rate, all of which were observed after about 30 min. These symptoms disappeared spontaneously 4 h later, without treatment. About 5 h after the challenge, the patient suffered from dyspnea and general cutaneous erythema, with urticaria of his face and body. Hydrocortisone was given and next morning he had no more symptoms. Laboratory data showed elevation of neutrophils and myeloperoxidase after the challenge, but no elevation of serum histamine. This is the second case of anaphylaxis or anaphylactoid reaction to Matsutake mushrooms for which IgE antibody to Matsutake may not be the cause.
