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3 downloadschronic, sinusitis, axial, dicom, .stl, printable, 3d, model, bone, frontal, paranasal, sinuses, ethmoid, sphenoid, orbit, nasal, lower, turbinates, septum, polypoid, mucosal, thickening, right, maxillary, antrum, osteomeatal, complex, mastoid, cells, hard, palate, teeth, clinoid, apophysis, head, skull, brain, ct, scan, without, contrast, maxillofacial, CLINICAL Chronic sinusitis. FINDINGS There is almost complete opacification of the left maxillary antrum. The osteomeatal complex is effaced. Polypoid mucosal thickening noted at the base of the right maxillary antrum. The osteomeatal complex intact. The frontal sinuses are clear. There is complete opacification of the left sphenoid sinus. The right sphenoid sinus is clear and the right sphenoethmoidal recess is patent. The ethmoid air cells appear clear. The nasal septum is minimally deviated to the left anteriorly. No bony erosion or expansion.