The role of the ostiomeatal unit
anatomic variations in inflammatory disease of the maxillary sinuses.
This system uses proprietary technology to allow direct, endoscopic visualization of the maxillary sinus ostium and balloon advancement into the ostiomeatal unit
(OMU) by accessing the maxillary antrum at the canine fossa through a small hole approximately 3 mm in diameter, as shown in figure 1, A.
Coronal noncontrast computed tomography (CT) performed with 3-mm collimation and interval revealed a left ICB, minimal and scattered mucosal thickening, and partial bilateral ostiomeatal unit
Endoscopy to visualize the nasal cavity, including the ostiomeatal unit
, helps make the diagnosis.
Immunodeficiency and local tissue conditions, such as allergic mucosal hypertrophy and chronic bacterial sinusitis, can create an obstruction of the ostiomeatal unit
and provide favorable conditions that allow the fungus to proliferate and invade.