Abstract
We observed, under the scanning and transmission electron microscope, the case of a bean-size tumor which developed from the moment of his birth in the front tooth area of the lower jaw of a male new-born baby of 37 days. Clinically it was diagnosed as a case of congenital epulis and histopathologically confirmed the congenital fibromatosis. The observation under the scanning electron microscope revealed that the tumor consisted of basically fibrous connective tissue and partly of osseous formation structure. Transmission electron microscope served to observe the variety of fibroblast patterns such as fusiform, stellated and plane one etc., as well as the existence of abundant reticular and collagenous fibrils in its stroma. These findings under both electron microscopes suggest to consider on the hamartoma character of the tumor from mesenchymal tissue.
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