肾混合性上皮间质肿瘤的临床病理

目的探讨肾混合性上皮间质肿瘤(MESTK)的病理学特点及其鉴别诊断。方法应用光镜和免疫组化方法分析3例MESTK,并复习相关文献。结果3例MESTK患者中,女性2例,男性1例,平均发病年龄为20岁。大体检查示肿瘤边界清,切面呈囊实性。光镜下显示肿瘤由上皮样细胞和梭形细胞混合而成,两种细胞成分均分化良好,无明显异型性及病理性核分裂相。免疫组化检测示上皮样细胞呈CK阳性反应。梭形细胞呈Vimentin、SMA、actin、PgR或ER及WT-1阳性反应。随访25~29个月,3例患者均未发现肿瘤复发及转移。结论MESTK是一种罕见的肾混合性肿瘤,患者预后良好。

Clinicopathology of mixed epithelial and stromal tumor of kidney

Objective To investigate the pathological features and differential diagnosis of mixed epithelial and stromal tumor of the kidney(MESTK). Methods Three patients with MESTK were studied by light microscopy and immunohistochemistry,and related literatures were reviewed. Results In the three patients,two were females and one was male,with the mean age of 20 years old.Examined grossly,the tumors were well circumscribed and typically composed of multiple cysts and solid areas.Microscopically,the tumors were composed of epithelial and spindle cells,both of the which were well differentiated with no atypia and mitosis of the nuclei.The immunohistochemical staining showed positive for the cytokeratin in the epithelial cells,and Vimentin,SMA,actin,PgR or ER and WT-1 in the spindle cells.No tumor recurrence and metastasis was found in all the three patients by 25 to 29 months of follow up. ConclusionMESTK is an uncommon mixed renal neoplasm with a favorable prognosis.