case_images: PMC9467816_01
case_images: Reconstructed panoramic image.
case_images: CRID2022-3694968.001.jpg
case_images: PMC9467816_01_CRID2022-3694968.001.jpg
case_images: fig1
case_images: On examination, missing right maxillary lateral incisor and third molars were noted (Figure 1).
case_images: CBCT axial (a), coronal (b), and sagittal (c) images show a large mass occupying the right ethmoid sinus.
case_images: CRID2022-3694968.002.jpg
case_images: PMC9467816_01_CRID2022-3694968.002.jpg
case_images: fig2
case_images: The axial slice CBCT images revealed a huge mass with a polypoid shape and soft density that occupied the right ethmoid sinus and sphenoid sinus (Figure 2(a)). Due to the infiltration or penetration of the lesion to the sphenoid sinus, focal bone erosion of the sphenoid sinus floor was suspected on the sagittal section CBCT images (Figure 2(c)). In addition, this lesion also had progressed into the region of the nose and right maxillary sinus (Figure 2(b)). The middle concha was displaced and was entirely obliterated by the lesion; variation in size of inferior concha was observed as well (Figure 2(b)).
case_images: MDCT axial (a), coronal (b), and sagittal (c) images showing opacification and expansion of multiple sinuses with centrally dense inspissated materials.
case_images: CRID2022-3694968.003.jpg
case_images: PMC9467816_01_CRID2022-3694968.003.jpg
case_images: fig3
case_images: Further, a non-contrasted multi-detector computed tomography (MDCT) was performed, and the images in all three planes showed inclusive soft tissue opacification in the affected sinuses (Figure 3). Expansion of multiple sinus walls with centrally dense inspissated material with different densities suggested the lesion is more likely to be chronic (Figure 3(a)). The base of the skull and the extraocular muscles were intact, and there was no evidence of this lesion infiltrating into adjacent fat or soft tissue (Figures 3(b), 3(c)).