摘要：
Purpose To investigate the clinicopathological characteristics,diagnosis and differential diagnosis of benign metastasizing leiomyoma (BML).Methods The clinicopathological data in 6 patients with BML were collected.All cases of BLM were investigated by HE and immunohistochemistry of EnVision method.Results All cases were female,with age of 33 -65 years,and had undergone myomectomy.5 cases had lung metastasis,including abdominal wall metastasis and spinal metastasis in each of the 1 cases,and another case had inguinal metastasis.Morphology showed that the tumor cells were spindle without obvious atypia,nuclear mitoses and necrosis,some cases were cellular.Immunohistochemical staining showed that the tumor cells were positive for SMA,SM-MHC,desmin,ER,PR,vimentin,while negative for S-100,CD117,CD34.Ki-67 label index were less than 5％.3 patients were alive with tumor and 3 patients were alive without tumor in the follow up of 18,28,40,31,36,80 months.Conclusion BML often occurs in female patients that undergone uterine myomectomy.The lung is the most common site of metastasis,often accompanied by other sites.The disease progresses slowly,and most patients have a longer survival time.%目的 探讨良性转移性平滑肌瘤(benign metastasizing leiomyoma,BML)的临床病理学特征、诊断及鉴别诊断.方法 收集6例BML患者的临床病理资料,采用HE及免疫组化EnVision法染色进行组织学观察.结果 6例患者均为女性,年龄33～ 65岁,均有子宫肌瘤手术史;5例为肺转移,其中伴腹壁转移、伴脊柱转移各1例,另1例为腹股沟转移;镜下为梭形细胞肿瘤,部分病例富于细胞,细胞异型性小,未见明显核分裂象及坏死.免疫表型:SMA、SM-MHC、desmin、vimentin、ER、PR均阳性,S-100、CD117、CD34均阴性,Ki-67增殖指数均小于5％;随访患者3例带瘤生存、3例无瘤生存,分别随访18、28、40、31、36、80个月.结论 BML多发于子宫平滑肌瘤手术史的女性患者,肺是其常见转移部位,常同时伴其它部位的转移,病情进展较缓慢,大多数患者生存期较长.
