However, plain film radiographs provide poor visualization of the ethmoid sinus due to density averaging. Plain films are therefore useful for diagnosing frontal and maxillary sinus disease but ...

The four paranasal sinuses (maxillary, frontal, ethmoid and sphenoid) develop as outpouchings of the nasal mucosa. They remain connected to the nasal cavity via narrow ostia with a lumen diameter ...

There are two of these air cavities in your forehead (frontal sinuses), several between your eyes and behind your nose (ethmoid sinuses), and two in your cheeks (maxillary sinuses), adds Glen ...

These polyps are growths found in the sinus areas, including the maxillary, ethmoid, frontal, and sphenoid sinuses, although not all patients will have polyps in every sinus. According to Dr.