女,67岁,全身反复起红斑、鳞屑40多年。近20年来,发作频繁。先后在数家医院诊为“牛皮癣”,曾外涂焦油类药物。1987年4月在某诊所行吸入疗法(药物主要成分为砷汞等,每周1次,每次约15分钟)后,皮疹较前有所减轻。当行第5次时,右肩胛下出现一鸽蛋大小的椭圆形皮下结节,质硬、不活动, Female, 67 years old, repeated erythema throughout the body, scales 40 years. In the past 20 years, seizures have been frequent. Has several hospitals in the diagnosis of “psoriasis”, had applied tar drugs. April 1987 In a clinic inhalation therapy (the main component of the drug as arsenic and mercury, once a week for about 15 minutes each time), the rash earlier reduced. When the line the fifth time, a pigeon egg size oval subcutaneous nodules appear under the right subscapular, hard, inactive,