case_images: PMC5889891_01
case_images: CT demonstrates lesion occupying ethmoid cells, nasal cavity, and maxillary sinus and extending through the lamina papyracea.
case_images: CRIOT2018-5428975.001.jpg
case_images: PMC5889891_01_CRIOT2018-5428975.001.jpg
case_images: fig1
case_images: T1-weighted MRI with fat suppression demonstrates the lesion extending to the pterigomaxillary fissure.
case_images: CRIOT2018-5428975.002.jpg
case_images: PMC5889891_01_CRIOT2018-5428975.002.jpg
case_images: fig2
case_images: (a) Neoplasia infiltrating surrounding tissue with irregular margins (H&E stain). (b) Atypical epithelial islands with ductal characteristics resembling adenocarcinoma (H&E stain).
case_images: CRIOT2018-5428975.003.jpg
case_images: PMC5889891_01_CRIOT2018-5428975.003.jpg
case_images: fig3
case_images: The biopsy resulted in adenocarcinoma (Figures 3(a) and 3(b)).
case_images: (a) Positive reaction to the PSA antigen in the epithelial islands, and there is no reaction in the superficial epithelium. (b) Strong expression of the PSA antigen in the ductal cells.
case_images: CRIOT2018-5428975.004.jpg
case_images: PMC5889891_01_CRIOT2018-5428975.004.jpg
case_images: fig4
case_images: The prostate-specific antigen (PSA) was highly positive, and the diagnosis was confirmed as metastatic prostate adenocarcinoma (Figures 4(a) and 4(b)).