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. 2022 Mar 21;16(1):31–39. doi: 10.1007/s12105-021-01405-6

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Fig. 1 — a Low grade dysplasia: hyperplastic epithelium with increased basal type cells, with very mild atypia, occupying lower half of epithelium. b High grade dysplasia: hyperplastic epithelium with increased atypical basal type cells, occupying almost entire thickness of epithelium, with preserved polarity. c Carcinoma in situ: parakeratotic, hyperplastic epithelium, with pronounced architectural and cellular abnormalities, with severe nuclear and cellular atypias, occupying the entire epithelial thickness