1临床资料患者男,15岁,因“左背部丘疹、结节、斑块15年”就诊。患者出生后不久左背部出背现数个丘疹,未予重视;后皮疹增大、数目逐渐增多,形成大小不一的结节,局部融合成斑块,无瘙痒及疼痛等不适,就诊于当地医院(具体诊断不详),未治疗。体格检查:一般情况可,各系统检查未见明显异常。皮肤科情况:左背部可见多数肤色丘疹、结节,局部融合成斑块;结节多呈圆形或轻度脑回状,境界清晰,表面形成明显的小凹陷,其内充满 1 Clinical data Patient male, 15 years old, because of “left back papules, nodules, plaque 15 years ” treatment. Shortly after the birth of the patient back to the back of the back of several papules, did not pay attention; rash increased, the number gradually increased to form nodules of varying sizes, local integration into plaque, no itching and pain and other discomfort, visit the local Hospital (specific diagnosis is unknown), untreated. Physical examination: the general situation can be, the system showed no significant abnormalities. Dermatology: the left back can be seen most skin color pimples, nodules, local fusion into plaques; nodules mostly round or mild brain back to the shape of a clear realm, the surface of the formation of obvious small depression, which is full