If the infection is in the posterior ethmoids and sphenoid, symptoms are described as deep in the head or referred to the occiput. Acute sinusitis is also typically accompanied by systemic signs ...

Axial CT scan through the ethmoid sinuses revealing complete opacification of the right anterior and posterior ethmoids as well as the right sphenoid sinus. The hyperdensities are evident within ...

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 ...