case_images: PMC7240621_01
case_images: Initial images. CT: shadow of the soft-tissue density of the right maxillary sinus; T2W: well-circumscribed, smoothly marginated tumor with a peripheral low area and a central inhomogeneous area.
case_images: CRIOT2020-4056901.001.jpg
case_images: PMC7240621_01_CRIOT2020-4056901.001.jpg
case_images: fig1
case_images: Magnetic resonance imaging showed a well-circumscribed and smoothly marginated tumor with a peripheral low area and central inhomogeneous area on T1-and T2-weighted images, primarily suggesting an organized hematoma (Figure 1).
case_images: (a) Right maxillary sinus opened with endoscopic modified medial maxillectomy. (b) Tumor (3 x 2 cm) in the right maxillary sinus (with a 70  endoscope). (c) Bleeding from the feeding artery based on the anterior wall of the right maxillary sinus. (d) Feeding artery cauterized and unblocked tumor resected.
case_images: CRIOT2020-4056901.002.jpg
case_images: PMC7240621_01_CRIOT2020-4056901.002.jpg
case_images: fig2
case_images: We cauterized the feeding artery and resected the tumor en bloc with a mucosa margin of 1 cm around the stem (Figures 2 and 3).
case_images: Post-ESS images. CT: Resected tumor in the right maxillary sinus.
case_images: CRIOT2020-4056901.003.jpg
case_images: PMC7240621_01_CRIOT2020-4056901.003.jpg
case_images: fig3
case_images: We cauterized the feeding artery and resected the tumor en bloc with a mucosa margin of 1 cm around the stem (Figures 2 and 3).
case_images: (a) Papillary structure. Cell nuclei are slightly larger with coarsely granular chromatin (hematoxylin and eosin, 100x). (b, c) Immunohistochemical staining revealed tumor cells positive for thyroid transcription factor 1 (TTF-1) (positive for carcinoma arising from follicular epithelial cells) and thyroglobulin.
case_images: CRIOT2020-4056901.004.jpg
case_images: PMC7240621_01_CRIOT2020-4056901.004.jpg
case_images: fig4
case_images: Histopathological diagnosis revealed a metastatic PTC tumor to the maxillary sinus (Figure 4).