Abstract
As a basic study, an analysis was made, using flow cytometry (FCM), of a mixture of KB cells and lymphocytes after Propidium Iodide (PI)- Fluorescein Isothiocyanate (FITC) double strain. As a result, DNA histogram of only KB cells could be drawn. As a clinical application an analysis was made, using FCM, of tumor of the head and neck after double stain. It enabled the drawing of DNA histogram of only epithelial cells (cancer cells). Changes in DNA histogram of keratin positive cells were classified into three types: Type I: the same diploid type as whole cells, Type II: the same aneuploid type as them, and Type III: the different aneuploid type as them. Among 22 cases of malignant tumor there were 3 cases of Type I, 6 cases of Type II, and 13 cases of Type III. This method could contribute greatly to the detection of cancer cells and DNA diagnosis, and thus be useful clinically.
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