结论恶性肌上皮瘤是一种上皮性肿瘤，其亚型透明细胞型恶性程度较高。
Conclusions The malignant myoepithelioma was epithelial tumour. The malignant grade of clear cell type was higher.
方法：对4岁男孩泪腺恶性肌上皮瘤患者的肿瘤组织进行光镜、电镜观察。
Methods:The tumor at the right orbit of a 4-yr. boy was excised and examined histologically—by light microscope and light transmission electron microscope.
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