Abstract
Case of fibroma which had developed in the tongue of a 39-year-old man was reported.
In addition to clinical finding, light and electron microscopic observation, the tumor was examined by X-ray qualitative spot analysis.
By light microscopy, the tumor was covered with keratinized squamous epithelium, the lamina propria mucosa was characterized by a remarkable increase in fibrous connective tissue, dilation of capillary endothelia and infiltration of inflammatory cells.
By scanning electron microscopy, the lamina propria mucosa was remarkably characteristic of increased mature collagen fibers which appeared as radial reliculation and bundle types.
Under transmission electron microscopy, the development of tumor cell's organelles was remarkable, mature collagen fibers which showed a periodic rhabdoid structure of 640 Å were observed in stroma.
As a result of X-ray qualitative spot analysis, the constituent elements of the tumor consisted of P, S, Cl, K and Ca.
There has been no recurrence of the lesion as of 8 months after the operation.
