A 19-year-old man presented with a 3-week history of an asymptomatic rash on his neck. He worked as a beach lifeguard in southern California and reported no recent international travel. On physical examination, two erythematous, raised, serpiginous eruptions were seen on the neck — one on the posterior surface and another on the right lateral surface. A punch biopsy showed nonspecific inflammation. A potassium hydroxide scraping was negative for fungal elements. What is the diagnosis?
一位19岁男性出现颈部无症状皮疹,病程已3周。他在加利福尼亚州南部担任海滩救生员,并报告近期无国际旅行史。体格检查发现颈部有两个红色、隆起、蜿蜒状的皮疹——一个在后侧,另一个在右侧。活检显示非特异性炎症。氢氧化钾刮片检查未发现真菌成分。诊断是什么?

A. Cutaneous larva migrans皮肤幼虫移行症
B. Larva currens快速幼虫移行症
C. Loiasis洛阿丝虫病
D. Tinea corporis体癣
E. Scabies疥疮
答案解析:
根据患者的职业以及皮疹的蜿蜒状形态特征,诊断为皮肤幼虫移行症。皮肤幼虫移行症是由于皮肤接触被猫或狗钩虫幼虫污染的土壤或沙子引起的。在美国,这种感染通常发生在国际旅行者中,但在美国较温暖的地区也可能本地获得。皮疹最常发生在足部和踝部,但该患者的颈部皮疹被认为与他躺在沙滩上的习惯有关。皮肤幼虫移行症通常非常瘙痒。其典型表现是幼虫在表皮中穿行,随后引起炎症反应。
正确答案:A
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