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 ...

These give excellent visualization of the frontal and maxillary sinuses and moderately good visualization of the sphenoid. However, plain film radiographs provide poor visualization of the ethmoid ...

Stage 3 The growth involves the lateral or lower aspects of the maxillary sinuses or extends into the frontal and sphenoid sinuses. Stage 4 The growth has spread outside of sinuses or is found to ...