case_images: PMC5443992_01
case_images: A well-circumscribed, dome, or cup-shaped central crater filled with keratin.
case_images: CRIPA2017-8257590.001.jpg
case_images: PMC5443992_01_CRIPA2017-8257590.001.jpg
case_images: fig1
case_images: Histologic examination of the lesion revealed a well-circumscribed, dome-shaped central crater filled with keratin (Figure 1).
case_images: Pushing, noninfiltrating margin of squamous epithelium.
case_images: CRIPA2017-8257590.002.jpg
case_images: PMC5443992_01_CRIPA2017-8257590.002.jpg
case_images: fig2
case_images: A pushing margin of squamous epithelium was seen; however, it was noninfiltrating distinguishing it from squamous cell carcinoma (Figure 2).
case_images: Well-differentiated squamous epithelium with ground-glass cytoplasm without atypia, dysplasia, or viral cytopathic effect.
case_images: CRIPA2017-8257590.003.jpg
case_images: PMC5443992_01_CRIPA2017-8257590.003.jpg
case_images: fig3
case_images: Well-differentiated squamous epithelium was observed with ground-glass cytoplasm (Figure 3), with no atypia, dysplasia, or viral cytopathic effect.
case_images: Intraepithelial microabscesses.
case_images: CRIPA2017-8257590.004.jpg
case_images: PMC5443992_01_CRIPA2017-8257590.004.jpg
case_images: fig4
case_images: Intraepithelial microabscesses were also present (Figure 4).