NCIt related terms : Frontal sinus structure (body structure);
NCIt definition : The paired, mucosal lined air spaces located above the orbit and communicating with
the nasal passages.;
Alternative definition : CDISC: The paired, mucosal lined air spaces located above the orbit and communicating
with the nasal passages. (NCI); NCI-GLOSS: A type of paranasal sinus (a hollow space in the bones around the nose).
There are two, large frontal sinuses in the frontal bone, which forms the lower part
of the forehead and reaches over the eye sockets and eyebrows. The frontal sinuses
are lined with cells that make mucus to keep the nose from drying out.;