case_images: PMC6854949_01
case_images: Linear, plaque-like whitish lesion on the palatal and buccal gingiva of 13, 14, and 15.
case_images: CRID2019-5785060.001.jpg
case_images: PMC6854949_01_CRID2019-5785060.001.jpg
case_images: fig1
case_images: Intraoral examination revealed a linear, plaque-like whitish lesion on the palatal and buccal free gingiva of 13, 14, and 15 (Figure 1).
case_images: IOPA radiograph of 13-15 region.
case_images: CRID2019-5785060.002.jpg
case_images: PMC6854949_01_CRID2019-5785060.002.jpg
case_images: fig2
case_images: She had no other significant extraoral or intraoral findings, and the radiological examination in relation to the site was normal (Figure 2).
case_images: Keratosis with mild epithelial dysplasia under H&E staining.
case_images: CRID2019-5785060.003.jpg
case_images: PMC6854949_01_CRID2019-5785060.003.jpg
case_images: fig3
case_images: Koilocytic cells under x40 magnification.
case_images: CRID2019-5785060.004.jpg
case_images: PMC6854949_01_CRID2019-5785060.004.jpg
case_images: fig4
case_images: Immunohistochemical assay with p16 showing positive staining in >50% of the cells with >25% cell confluency.
case_images: CRID2019-5785060.005.jpg
case_images: PMC6854949_01_CRID2019-5785060.005.jpg
case_images: fig5
case_images: Furthermore, due to the presence of koilocytosis, immunohistochemical evaluation was carried out with p16 antibody which clearly revealed positivity in >50% of the cells with >25% confluency (Figure 5).