肿瘤由形态多样的上皮样细胞构成，胞质嗜酸性或透亮，来源于中间型滋养细胞。免疫组织化学瘤细胞表达CK、MBP、H CG、HPL等。
The tumor cells were composed of polymorphic epithelioid cells with eosinophilic or clear cytoplasm, and they derived from intermediate trophoblast (it), and could expressed CK, MBP, HCG and HPL.
观察表明中间型上皮的基本特征是细胞胞质内含有发育良好的管泡状系统和较丰富的张力微丝（束）。
The intermediate epithelial cells were characterized by their abundant cytoplasmic tonofilaments and well developed tubulo-vesicular system.
结论：DOK细胞属正常细胞向癌转变的中间过渡型细胞，可作为研究口腔癌前病变的细胞模型。
Conclusion: DOK is a kind of special transitional cells type from normal to tumor cells, which present a good cell model to study carcinogenesis and chemoprevention.
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