Fig. 2

Microscopic findings of the POT. a It consisted of a proliferation of cellular myxoid connective tissue, which is less vascular, less cellular, and more collagenous. The periphery of the tumor is surfaced by a monolayer of columnar epithelium. The cord-like or nests of enfolded epithelium are present (hematoxylin and eosin stain; magnification, × 40). b The external aspect of the tumor is surfaced by columnar epithelial cells, which show “reverse nuclear polarization” (nuclei displaced away from the connective tissue and cytoplasm showed vacuolated at the bottom part) (magnification, × 200). c The cord-like or nests of the enfolded epithelium possessed stellate reticulum between the columnar cells (magnification, × 200). d Dentine existed adjacent to the tumor (magnification, × 40)