case_images: PMC5872656_01
case_images: Intraoral view of lesion in anterior maxillary region.
case_images: CRID2018-3642827.001.jpg
case_images: PMC5872656_01_CRID2018-3642827.001.jpg
case_images: fig1
case_images: On examination, a firm ovoid swelling of size 3 x 2.5 cm was found on the attached gingiva with respect to 11 and 12 extending from free marginal groove inferiorly to the buccal sulcus superiorly (Figure 1).
case_images: Intraoral periapical radiograph showing mild alteration in the trabecular pattern in relation to 11 and 12.
case_images: CRID2018-3642827.002.jpg
case_images: PMC5872656_01_CRID2018-3642827.002.jpg
case_images: fig2
case_images: Photomicrograph showing lobulated mass of cartilaginous tissue (H&E, 10x).
case_images: CRID2018-3642827.003.jpg
case_images: PMC5872656_01_CRID2018-3642827.003.jpg
case_images: fig3
case_images: The diagnostic clue of the lesion is "histological examination showed well-circumscribed lobulated mass (Figure 3) of cartilaginous tissue with no cellular atypia, necrosis, or vascular invasion.
case_images: Photomicrograph showing no cellular atypia (H&E, 40x).
case_images: CRID2018-3642827.004.jpg
case_images: PMC5872656_01_CRID2018-3642827.004.jpg
case_images: fig4
case_images: There was no binucleation or multinucleation (Figure 4)".
case_images: Immunostaining showing positivity for vimentin (H&E, 10x).
case_images: CRID2018-3642827.005.jpg
case_images: PMC5872656_01_CRID2018-3642827.005.jpg
case_images: fig5
case_images: Immunohistochemically, most of the tumor cells were positive for vimentin and S100 protein (Figures 5 and 6).
case_images: Immunostaining showing positivity for S100 (H&E, 10x).
case_images: CRID2018-3642827.006.jpg
case_images: PMC5872656_01_CRID2018-3642827.006.jpg
case_images: fig6
case_images: Immunohistochemically, most of the tumor cells were positive for vimentin and S100 protein (Figures 5 and 6).
case_images: Toluidine blue staining showing typical metachromasia of cartilage.
case_images: CRID2018-3642827.007.jpg
case_images: PMC5872656_01_CRID2018-3642827.007.jpg
case_images: fig7
case_images: For academic interest, toluidine blue staining was done, which showed typical metachromatism (Figure 7).