NCIt definition : An acute or chronic inflammatory process affecting the mucous membranes of any sinus
cavity.;
Alternative definition : NICHD: Inflammation of the mucous membranes lining a sinus cavity.; CTCAE: A disorder characterized by an infectious process involving the mucous membranes
of the paranasal sinuses.; FDA: Inflammation (swelling and redness) of the paranasal sinuses, associated or related
to implantation procedures or devices.;