case_images: PMC8328710_01
case_images: Slow-growing painless mass.
case_images: CRID2021-5541320.001.jpg
case_images: PMC8328710_01_CRID2021-5541320.001.jpg
case_images: fig1
case_images: The nodular formation was reddish-pink in color, had a solid consistency, and measured approximately 40 x 15 mm with a periodontal probe (Deppeler SA, Rolle, Switzerland) (Figure 1).
case_images: Intraoral findings.
case_images: CRID2021-5541320.002.jpg
case_images: PMC8328710_01_CRID2021-5541320.002.jpg
case_images: fig2
case_images: He had been wearing the total denture using a denture adhesive (Figure 2).
case_images: Orthopantomographic image showing no underlying bone resorption or defect.
case_images: CRID2021-5541320.003.jpg
case_images: PMC8328710_01_CRID2021-5541320.003.jpg
case_images: fig3
case_images: Orthopantomographic imaging was performed, and underlying bone resorption and defects were excluded (Figure 3).
case_images: Slightly mottled, multilayered squamous epithelium over a stroma occupied by a multiplied, partially hyalinized binder.
case_images: CRID2021-5541320.004.jpg
case_images: PMC8328710_01_CRID2021-5541320.004.jpg
case_images: fig4
case_images: The histopathological assessments revealed a slightly mottled, multilayered squamous epithelium over a stroma occupied by a multiplied, partially hyalinized binder (Figure 4).
case_images: Collagen accumulations showing apple-green birefringence of amyloid under polarized light.
case_images: CRID2021-5541320.005.jpg
case_images: PMC8328710_01_CRID2021-5541320.005.jpg
case_images: fig5
case_images: The samples were subsequently stained with Congo red, following which collagen accumulations were observed with the apple-green birefringence of amyloid under polarized light (Figure 5).
case_images: Ductile formation specimen after surgical excision.
case_images: CRID2021-5541320.006.jpg
case_images: PMC8328710_01_CRID2021-5541320.006.jpg
case_images: fig6
case_images: Normal tissue healing at the follow-up assessment after 1.5 years.
case_images: CRID2021-5541320.007.jpg
case_images: PMC8328710_01_CRID2021-5541320.007.jpg
case_images: fig7
case_images: The patient was followed up for 1.5 years, during which he showed normal tissue healing and no sign of recurrence (Figure 7).