An axial non-contrast computed tomography (CT) scan of the paranasal sinuses at the level of the ethmoidal and maxillary regions. The image demonstrates significant bilateral mucosal thickening and opacification involving the maxillary sinuses and the ethmoidal air cells. These regions exhibit soft tissue density (intermediate gray) replacing the normal dark, air-filled spaces. The opacification appears diffuse, with notable involvement of the posterior ethmoid cells. The surrounding bony architecture, including the orbital walls and nasal septum, remains visible. Clinically, such findings in the context of a diabetic or immunocompromised patient are suggestive of severe inflammatory or infectious processes, such as acute rhinosinusitis or invasive fungal sinusitis (e.g., aspergillosis). This diagnostic image is essential for evaluating the extent of sinus disease and assessing for potential bony erosion or orbital extension in ENT and radiology education.

This diagnostic image is a non-contrast axial Computed Tomography (CT) scan of the paranasal sinuses. The scan demonstrates significant pathology in the left paranasal sinuses compared to the right. There is subtotal opacity of the left maxillary sinus, characterized by soft tissue density almost completely filling the sinus cavity, indicative of chronic rhinosinusitis or fluid accumulation. Additionally, the image shows evidence of ethmoidal sinusitis with mucosal thickening and opacification of the ethmoid air cells. In contrast, the right maxillary sinus remains primarily air-filled with minor peripheral mucosal thickening. White arrows indicate areas of significant inflammation and narrowing of the nasal passages. The surrounding bony structures of the sinus walls appear intact, and the mastoid air cells are visible inferiorly. This clinical imaging is essential for evaluating chronic sinus disease, which may be associated with systemic conditions such as Yellow Nail Syndrome (YNS).

This diagnostic image is an axial non-contrast Computed Tomography (CT) scan of the paranasal sinuses. The scan demonstrates bilateral abnormalities within the maxillary and ethmoidal sinuses. Specifically, there is prominent mucosal thickening characterized by ill-defined, heterogeneous soft tissue signal intensity that partially opacifies the normally air-filled sinus cavities. The thickening is visible along the walls of both the right and left maxillary sinuses, appearing denser than air but less dense than cortical bone. The ethmoidal air cells also show evidence of soft tissue density, indicating inflammatory or infectious processes such as sinusitis. These findings are clinically significant in the context of paranasal sinus disease and are used to evaluate the extent of sinonasal involvement prior to interventions like Functional Endoscopic Sinus Surgery (FESS). The image serves as an educational example of radiologic manifestations of chronic or acute inflammatory sinus pathology.

A head computed tomography (CT) scan displaying axial (A) and coronal (B) views of the paranasal sinuses. The imaging reveals a large, soft-tissue density mass measuring approximately 24 mm x 28 mm x 26 mm, which completely obliterates the left maxillary sinus. In both views, the lesion demonstrates expansion into the adjacent nasal cavity and causes total obstruction of the left anterior osteomeatal unit. Secondary findings include mucosal thickening and opacification of the left ethmoid air cells, consistent with secondary ethmoidal sinusitis. The right maxillary and ethmoid sinuses appear clear and well-aerated. This diagnostic image illustrates the radiological presentation of a sinonasal mass, such as an inverted papilloma or other neoplasm, highlighting the resulting regional obstruction and secondary inflammatory changes in the paranasal sinus system. It is an educational example of sinus pathology and the importance of evaluating the osteomeatal complex for obstructive complications.