科研之友
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摘要
tuberculids are cutaneous immunologic reactions to the presence of tuberculosis, which is often occult elsewhere in the body. a wide range of skin disorders has been interpreted as tuberculids in the past. currently, however, only three entities are regarded as true tuberculids: papulonecrotic tuberculid, erythema induratum and lichen scrofulosorum. patients with lichen scrofulosorum have a strongly positive tuberculin reaction and an excellent response to treatment with antituberculous drugs.
