患儿女,2月24天.颈部、躯干出现丘疹2月.皮肤科情况:颈部、躯干见数十个皮色及暗红色粟粒大小丘疹.病理示:真皮见多数组织细胞浸润,未见明显泡沫细胞及Touton巨细胞.免疫组化:Kp-1+++,PG-M1++,CDla(-),Langerin(-),S-100(-).诊断:泛发性发疹性组织细胞瘤.随诊3月,皮疹消退.“,”A 2-month-old female presented with papules on neck and trunk for 2 months.Clinical examination showed multiple dark red or skin-colored millary papules on neck and trunk.Histopathologic examination showed numerous histiocytes infiltrated in dermis without foam cells and Touton giant cells.Immunohistochemically the histiocytes showed diffusively positive for Kp-1,PG-M1,negative for CDla,Langerin,S-100.Based on these findings,diagnosis was made as generalized eruptive histiocytoma.Lesions showed spantenous regression 3 months later.