局所麻酔薬が原因と考えた術後左大腿部皮疹

・局所麻酔薬による全身型接触皮膚炎（systemic contact-type dermatitis）と考えられた1例を報告した． ・自験例はパッチテストでJapanese stan­dard allergen（JSA）を貼布することで皮疹の原因を明らかにすることができ，JSAの貼布が有意義であることを示した． （「症例のポイント」より）

A case of postoperative left thigh rash caused by local anesthetics

Baba, Kanako1）Kanto, Hiromi1）Ito, Takashi1）Nakagawa, Mari1）Iwabuchi, Chikako2）Ishiko, Akira1） 1）Department of Dermatology, School of medicine, Toho University 2）Division of Dermatology Nissan Tamagawa Hospital

Abstract A 40-year-old male patient visited our hospital complaining the rash on the left buttock and the thigh, which he noticed three days after the operation of hemorrhoids. We initialy thought his eruption was induced by oral medicines or disinfectants, so we did patch test using these components and the Japanese standard allergens. As a result, the patch test showed a positive reaction only to the anesthetic allergen （caine mix） included in Japanese standard allergens.He had a history of using the commercial topical ointment frequently, and we supposed that he had been already sensitized to the local anesthetic by commercial antipruritic ointment.Finally we concluded his postoperative eruption was a systemic contact dermatitis, due to the local anesthetics which was used during the hemorrhoids operation.