PMC9893102_01
Non-contrast computed tomography of paranasal sinuses (NCCTPNS) axial section.. The white arrow indicates a separate maxillary antral mucocele, the red arrow indicates right main maxillary antrum, and the blue arrow indicates the left maxillary antrum.
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NCCT PNS coronal section.
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NCCT PNS axial section.. Non-contrast computed tomography (NCCT) of the nose and paranasal sinuses axial section (Figures 1 and 3) and coronal section (Figure 2). The figures revealed mucosal thickening in the right ethmoidal air cells and maxillary sinus. A right infraorbital well-defined expansile cystic mass represented by white arrow superolateral to the right main maxillary sinus represented by a red arrow, seen filled with homogeneous fluid content with a rarified thin wall, it measures (37 x 35 x 39) mm (AP x TR x CC). It is noted flattening the right orbital floor with loss of the normal orbital globular shape, abutting inferior rectus muscle superiorly, extending into the zygomatic process laterally, compressing the right main maxillary sinus inferiorly, and medially obstructing the right maxillary sinus drainage with subsequent developing secondary maxillary sinusitis (Figures 1-3).
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Photomicrograph of the excised maxillary sinus mucocele shows a cystic cavity lined by pseudostratified ciliated columnar epithelium rested on fibrous stroma (magnification 200x).
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Histological sections of the cyst lining revealed stratified squamous epithelium resting on a fibrous stroma (Figure 4).