患者女,45岁,宁夏人。1986年9月于左股内侧出现米粒大红色丘疹,渐扩大成青紫色斑块。3个月后在当地医院作病检,报告为“左大腿内侧不典型纤维组织细胞瘤”,即行手术切除,切口愈合良好。1987年5月,局部又出现青紫色斑块,在当地医院第2次作病检。病理诊断“左大腿内侧皮肤幼年黑 Female patient, 45 years old, Ningxia. In September 1986, a large red papule appeared on the inner side of the left thigh, gradually expanding into a blue-purple patch. Three months later, a medical examination was performed in a local hospital. The report was “atypical fibrous histiocytoma in the medial thigh”. Surgical resection was performed and the incision healed well. In May 1987, there were blue-and-violet plaques in local areas and the second time the local hospital had a medical examination. Pathological diagnosis "Left thigh skin young black