摘要Objective:To analyze the clinicopathological features and differential diagnosis of angiomyofibroblastoma(AMFB) of the vulva. Methods:Two cases of AMFB were examined by light microscopy and immunohistochemical study and to discuss the clinicopatholoical features and differential diagnosis of AMFB with the reference to the literature. Results:Tumors were all circumscribed,and＜5 cm in diameter.Microscopically,the tumors were composed of spindle or polygonal cells that were cellularly or hypocellularly arranged with perivascular accentuation in a mucoid or fibrocollagenous background.The tumors contained numerous small-to medium-sized blood vessels,which were characteristically thin walled.Immunohistochemically,two cases of tumor cells were positive for vimentin,SMA,CD34(+)and FⅧ(+). Desmin and MSA were positive in one case:Cytokeratin,S-100,CD31 were negative in both. Conclusion:AMFB is a rare,benign soft tissue tumor that occurs in the genital tract of adult women.The origin remains unclear,but it is suggested that an origin from a perivascular pluripotent stem cell that is capable of myofibroblastoma differentiation.Angiomyofibroblastoma should be differentiated from other neoplasms of the vulva such as aggressive angiomyxoma, superficial angiomyxoma and cellular angiofibroma.