case_images: PMC5406790_01
case_images: Clinical image shows noduloulcerative growth with keratin plugging seen on left vermilion of the lower lip
case_images: JOMFP-21-115-g001.jpg
case_images: PMC5406790_01_JOMFP-21-115-g001.jpg
case_images: F1
case_images: Clinical examination revealed a well-defined, nontender, ulcerated, nodular growth measuring approximately 1 cm x 1 cm on the lower lip vermilion [Figure 1].
case_images: Histopathological image shows hyperkeratotic epithelium with parakeratin plugging overlying connective tissue stroma with epithelial proliferations superficially in the stroma (H&E, x40)
case_images: JOMFP-21-115-g002.jpg
case_images: PMC5406790_01_JOMFP-21-115-g002.jpg
case_images: F2
case_images: The underlying connective tissue stroma showed multiple areas of epithelial tissue entrapment with cystic degeneration in the center and keratinization [Figures 2 and 3].
case_images: Histopathological image shows epithelial tissue entrapment with cystic degeneration in the center and keratinization (H&E, x100). Inset (H&E, x400)
case_images: JOMFP-21-115-g003.jpg
case_images: PMC5406790_01_JOMFP-21-115-g003.jpg
case_images: F3
case_images: The underlying connective tissue stroma showed multiple areas of epithelial tissue entrapment with cystic degeneration in the center and keratinization [Figures 2 and 3].
case_images: Histopathological image shows periodic acid-Schiff-stained section showing negative staining for glycogen granules (H&E, x100). Inset (PAS, x400)
case_images: JOMFP-21-115-g004.jpg
case_images: PMC5406790_01_JOMFP-21-115-g004.jpg
case_images: F4
case_images: The epithelial proliferations in the connective tissue did not exhibit PAS positive glycogen granules though [Figure 4].