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通过1例典型病例进一步认识复发性半环状丘疹性红斑的临床特点.该病常见于中青年男性,春夏季发病,多到秋冬季后可缓解,但来年易复发.皮疹主要表现为环状或半环状损害,边缘由针尖至米粒大丘疹及片状红斑组成,皮损可逐渐呈离心性扩大.多数患者在出汗后皮损及瘙痒加重.组织病理上除了浅层血管周围的炎症外,在真皮中部小汗腺周围也有一定的炎性细胞浸润.尽管该病发病机制尚不清楚,鉴于其相对特征性的临床表现,应与湿疹或其他环状红斑相鉴别.“,”To enrich our knowledge of the clinical characteristics of erythema papulosa semicircularis recidivans(EPSR) by describing a typical case.The EPSR usually occurs in young and middle aged men.The recurrent skin lesions usually appear in the spring and summer,and regress in the autumn and winter.Lesions appear as circular or semi-circular shape surrounded by needle-tip-to grain-sized papules and erythemas.Lesions can expand centrifugally.The majority of patients experience exacerbation of lesions and pruritus after sweating.Histopathological examination showed superficial perivascular inflammation,and mild inflammation around sweat glands in the middle dermis.Although the pathogenesis of EPSR is largely unknown,the relatively specific manifestations make it distinct from eczema and other well-described annular erythemas.