84 photographs of the oral epithelium were analyzed, 60 of them showed oral epithelium squamous cell carcinoma and the rest - healthy epithelium. The photographs where taken in 500x and 5000x magnification. For this study a Japanese electron microscope JEOL JSM 5400 was used. The authors observed great differences in the both groups of patients, mainly in the epithelium density as well as in the occurrence of "blank spaces" instead of cells. The observations confirm the usefulness of an electron microscope in medical examinations. Due to reuse of tissue segments, previously taken to pathological diagnosis in light microscope, we can limit invasive methods of diagnosis.
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