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患者男,17岁.腹部丘疹13年,泛发全身3个月.皮肤科情况:颈部、躯干、四肢、臀部密集分布针尖至粟粒大小光滑丘疹,呈肤色或淡白色,表面有光泽,互不融合,触之较硬,部分皮损排列成线状(Koebner现象).右大腿皮损组织病理示:表皮轻度萎缩,基底细胞液化变性,真皮乳头变宽有致密淋巴细胞浸润,呈“抱球状”,表皮突延伸.诊断:泛发性光泽苔藓.“,”A 17-year-old male presented with papules on the abdomen for 13 years,and on the whole body for 3 months.Dermatological examination showed multiple pinpoint-to millet-sized,fresh-to white-colored,shiny papules on the neck,trunk,limbs and buttocks.Some papules were distributed linearly (Koebner phenomenon).Histopathological features of lesion on the right thigh included epidermal atrophy,liquefaction degeneration of the basal cells,widened dermal papillae with lymphocytic infiltration clutched by elongated epidermal rete ridges,resembling a “ball and claw” pattern.The diagnosis was generalized lichen nitidus.