Fig. 3
From: Primordial odontogenic tumor: a case report and literature review
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs13000-019-0867-4/MediaObjects/13000_2019_867_Fig3_HTML.png)
Histopathological and immunohistochemical findings of POT. a Hematoxylin and eosin staining of POT. b CK19 was positive only in columnar epithelium. c Vimentin was positive throughout the tumor tissue (strongly positive in epithelial layers and moderately positive in mesenchymal tumor cells). d Ectomesenchymal cells were negative for α-SMA. e Ectomesenchymal cells were negative for S-100 protein. f Ki67 labeling index was basically lower than 2%. (magnification, × 100)