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13.
Dysplastic epithelial changes as a sequence of binary event in gastric pathology
Koktysz, Robert ; Zielínski, Krzystof
A simple, semiquantitative method for evaluation of epithelial and glandular changes in gastric hyperplastic lesions is presented. The difference of morphological features of the neighboured cells ...are denoted as the twenty-elements series of binary digits (0 or 1). The study was carried out in 89 gastric biopsy specimens divided qualitatively into five diagnostic groups (Jarvis and Whitehead classification) 1) no hyperplastic changes 2) lowgrade dysplasia, 3) moderate dysplasia, 4) severe dysplasia, and 5) highly differentiated carcinoma. The following cytomorphological features were assessed semiquantitatively in glandular epithelia: differences in the shape of the nuclei, differences in the size of nuclei and in the position of the nuclei, differences in the axial direction as well as the differences in glandshapes. The resulting data were in the form of Êpercentage changesĚ for each case and each feature. To evaluate the usefulness in such kind of ANOVA, Kruskall-Wallis nonparametric ANOVA, Mann-Whitney test and multiple regression analysis were performed. Intra- and interobserver variability was also assessed. We concluded that our simple method gives comparable and reproducible results. All applied statistical methods gave similar results. The most "discriminating" cell features were: position of the nucleus in the cell, size and shape of the nucleus and loss of nuclear polarisation. Significant differences were found between the control group and low grade dysplasia and between high grade dysplasia and carcinoma
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