Abstract: Guo Chunfang, Chen Guang, Li Tie′nan, Sun Xiaojie, Jin Chunlin, Wang Zhen Department of Dermatology, Shenyang No.7 People′s Hospital, Shenyang 110003, China （Guo CF, Li TN, Sun XJ, Jin CL, Wang Z）; Department of Dermatology, The First Hospital of China Medical University, Shenyang 110001, China （Chen G） Corresponding author: Chen Guang, Email: dr.cg@126.com 【Abstract】 Objective To investigate clinical and reflectance confocal microscopy（RCM）features of extragenital lichen sclerosus et atrophicus. Methods Clinical data and RCM images were collected from 11 patients with extragenital lichen sclerosus et atrophicus in Department of Dermatology of Shenyang No.7 People′s Hospital and the First Hospital of China Medical University between October 2010 and October 2016, and retrospectively analyzed. Results Of the 11 patients, 9 were female, and 6 had lesions on the neck. RCM imaging showed atrophy of the epidermis, disappearance of high reflectivity and circular structures in the basal layer, blurred dermo-epidermal junction, highly reflective quasi-circular big cells and a few mononuclear cells scattering in the superficial dermis, and homogenization and increased density of collagen. Conclusion Extragenital lichen sclerosus et atrophicus has characteristic RCM presentation.

Key words: Lichen sclerosus et atrophicus, Microscopy, confocal, Skin manifestations