临床资料患者,女,10岁。主因右上臂红斑、结痂伴瘙痒8 d,于2013年4月就诊。患者8 d前右上臂出现一黄豆大小红斑,伴瘙痒,逐渐扩大,表面渗出黄色液体,结痂。患者于发病前20 d在外购买宠物兔,并与之密切接触。体格检查:一般情况好,系统检查未见异常。皮肤科检查:右上臂内侧一2cm×2.5cm红斑,境界清楚,边缘覆盖黄色痂皮;揭去痂皮见基底皮肤潮红,中央无退行改变(图1a)。嘱患 Clinical data, female, 10 years old. Mainly due to the right upper arm erythema, crusting with itching 8 d, in April 2013 treatment. Patients in the upper right arm 8 days before the emergence of a red bean size erythema, with itching, and gradually expanded, the surface oozing yellow liquid, scab. Patients purchased pet rabbits 20 days prior to onset and were in close contact with them. Physical examination: the general situation is good, the system check no abnormalities. Dermatology examination: a 2cm × 2.5cm erythema inside the right upper arm, the realm of clear edge covered with yellow crusts; remove the crust to see the basement skin flush, the central non-retrograde changes (Figure 1a). Hospice