case_images: PMC8543100_01
case_images: Photograph showing the ulceroproliferative lesion with indurated margins in the mandibular anterior gingiva.
case_images: DRJ-18-80-g001.jpg
case_images: PMC8543100_01_DRJ-18-80-g001.jpg
case_images: F1
case_images: The lesion was extending labiolingually from labial attached gingiva to lingual attached gingiva and mesiodistally from mandibular left canine to mandibular right first premolar region [Figure 1].
case_images: Photomicrograph showing connective tissue stroma showing along with island and sheets made of basaloid cells invaded into connective tissue (H and E stain, x4).
case_images: DRJ-18-80-g002.jpg
case_images: PMC8543100_01_DRJ-18-80-g002.jpg
case_images: F2
case_images: Invaded epithelial cells were in the form of nests, islands, and sheets composed of basaloid cells showing hyperchromatic large nuclei and indistinct cytoplasm [Figures 2 and 3].
case_images: Photomicrograph showing hyperchromatic large nuclei and indistinct cytoplasm (H and E stain, x40).
case_images: DRJ-18-80-g003.jpg
case_images: PMC8543100_01_DRJ-18-80-g003.jpg
case_images: F3
case_images: Invaded epithelial cells were in the form of nests, islands, and sheets composed of basaloid cells showing hyperchromatic large nuclei and indistinct cytoplasm [Figures 2 and 3].
case_images: Photomicrograph showing areas of comedonecrosis in between the sheets of cells (H and E stain, x40).
case_images: DRJ-18-80-g004.jpg
case_images: PMC8543100_01_DRJ-18-80-g004.jpg
case_images: F4
case_images: Areas of comedonecrosis were seen in between the sheets of cells [Figure 4].
case_images: Photomicrograph showing positivity for pan-cytokeratin AE/AE3. (immunohistochemical stain, x10).
case_images: DRJ-18-80-g005.jpg
case_images: PMC8543100_01_DRJ-18-80-g005.jpg
case_images: F5
case_images: The negative results of PAS and positive for pan-cytokeratin [Figure 5] lead to the final diagnosis of BSCC.