Editing Sinusitis (section)

====Definition and nomenclature====
By definition, chronic sinusitis lasts longer than 12 weeks and can be caused by many different diseases that share chronic inflammation of the sinuses as a common symptom. It is subdivided into cases with and without [[nasal polyp|polyps]]. When polyps are present, the condition is called chronic [[hyperplastic]] sinusitis; however, the causes are poorly understood.<ref name="pmid18206715">{{cite journal | vauthors = Leung RS, Katial R | title = The diagnosis and management of acute and chronic sinusitis | journal = Primary Care | volume = 35 | issue = 1 | pages = 11–24, v-vi | date = March 2008 | pmid = 18206715 | doi = 10.1016/j.pop.2007.09.002 }}</ref> It may develop with anatomic derangements, including deviation of the nasal septum and the presence of concha bullosa (pneumatization of the middle concha) that inhibit the outflow of mucus, or with allergic rhinitis, asthma, cystic fibrosis, and dental infections.<ref>{{cite book|isbn=9780323543842|title=Oral radiology: principles and interpretation|publisher=Elsevier|vauthors=White SC, Pharoah MJ|date=12 September 2018 |location=St. Louis, Missouri}}</ref>

Chronic rhinosinusitis represents a multifactorial inflammatory disorder, rather than simply a persistent bacterial infection.<ref name="pmid18206715" /> The medical management of chronic rhinosinusitis is now focused upon controlling the inflammation that predisposes people to obstruction, reducing the incidence of infections.<ref name="pmid21735433">{{cite journal | vauthors = Ahmed J, Pal S, Hopkins C, Jayaraj S | title = Functional endoscopic balloon dilation of sinus ostia for chronic rhinosinusitis | journal = The Cochrane Database of Systematic Reviews | issue = 7 | pages = CD008515 | date = July 2011 | pmid = 21735433 | doi = 10.1002/14651858.CD008515.pub2 }}</ref> Surgery may be needed if medications are not working.<ref name="pmid21735433" />

Attempts have been made to provide a more consistent nomenclature for subtypes of chronic sinusitis. The presence of [[Eosinophil granulocyte|eosinophils]] in the mucous lining of the nose and paranasal sinuses has been demonstrated for many people, and this has been termed eosinophilic mucin rhinosinusitis (EMRS). Cases of EMRS may be related to an allergic response, but allergy is not often documented, resulting in further subcategorization into allergic and nonallergic EMRS.<ref>{{cite journal | vauthors = Chakrabarti A, Denning DW, Ferguson BJ, Ponikau J, Buzina W, Kita H, Marple B, Panda N, Vlaminck S, Kauffmann-Lacroix C, Das A, Singh P, Taj-Aldeen SJ, Kantarcioglu AS, Handa KK, Gupta A, Thungabathra M, Shivaprakash MR, Bal A, Fothergill A, Radotra BD | title = Fungal rhinosinusitis: a categorization and definitional schema addressing current controversies | journal = The Laryngoscope | volume = 119 | issue = 9 | pages = 1809–18 | date = September 2009 | pmid = 19544383 | pmc = 2741302 | doi = 10.1002/lary.20520 }}</ref>