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Keywords:

  • antituberculous agent;
  • delayed-type hypersensitivity;
  • lichen nitidus

Summary We describe a Japanese girl with generalized lichen nitidus. She had been exposed to Mycobacterium tuberculosis at 6 years of age via her teacher. At 8 years of age, she developed severe contact dermatitis on sun-exposed areas after contact with Japanese lacquer trees. Shortly after, numerous tiny, shiny, flesh-coloured papules developed over the upper part of her body. At 10 years of age, she was exposed to a school outbreak of M. tuberculosis. Her eruption showed no response to topical corticosteroids or oral tranilast, but most of the papules completely disappeared after she had received oral isoniazid for 6 months.