The term rhinosinusitis is defined as inflammation of nose and paranasal sinuses characterised by nasal blockage, nasal discharge, post-nasal drip, facial pain, pressure and reduction/loss of smell with corresponding endoscopic appearance and CT scan changes. The combined term is more apt than individual rhinitis or sinusitis as it is unusual for having sinus inflammation alone in the absence of nasal inflammation. The disease occurs due to obstruction in the key area, i.e., the osteomeatal complex (OMC). This chapter discusses anatomical variations responsible for the blockage of OMC leading to rhinosinusitis. Nasal endoscopic findings and radiological features depicting these variations are discussed in detail.
Part of the book: Rhinosinusitis