They are found in a perivascular network and may serve as the antigen presenting cell which initiates immune responses to antigens delivered through the circulation.
它们位于血管网周围，可以起到抗原递呈细胞的作用。抗原递呈细胞启动针对抗原的免疫反应并释放入血。
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Objective To report a case of perivascular epithelioid cell tumor (PEComa) of the liver, and improve the understanding of the tumor.