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==Definition of an enlarged lymph node==
Moved to here since it's not that relevant.
[[File:Long and short axis.png|120px|right]]
*By size, where lymphadenopathy in adults is often defined as a short axis of one or more lymph nodes is greater than 10mm.<ref name="GaneshalingamKoh2009"/><ref name="Schmidt JúniorRodrigues2007"/> However, there is regional variation as detailed in this table:
{|class="wikitable"
|+Upper limit of lymph node sizes in adults
|-
| Generally || 10 mm<ref name="GaneshalingamKoh2009">{{cite journal|last1=Ganeshalingam|first1=Skandadas|last2=Koh|first2=Dow-Mu|title=Nodal staging|journal=Cancer Imaging|volume=9|issue=1|pages=104–111|year=2009|issn=1470-7330|doi=10.1102/1470-7330.2009.0017|pmid=20080453|pmc=2821588}}</ref><ref name="Schmidt JúniorRodrigues2007">{{cite journal|last1=Schmidt Júnior|first1=Aurelino Fernandes|last2=Rodrigues|first2=Olavo Ribeiro|last3=Matheus|first3=Roberto Storte|last4=Kim|first4=Jorge Du Ub|last5=Jatene|first5=Fábio Biscegli|title=Distribuição, tamanho e número dos linfonodos mediastinais: definições por meio de estudo anatômico|journal=Jornal Brasileiro de Pneumologia|volume=33|issue=2|year=2007|pages=134–140|issn=1806-3713|doi=10.1590/S1806-37132007000200006|pmid=17724531|doi-access=free}}</ref>
|-
| Inguinal || 10<ref name=Torabi2004>{{cite journal | vauthors = Torabi M, Aquino SL, Harisinghani MG | title = Current concepts in lymph node imaging | journal = Journal of Nuclear Medicine | volume = 45 | issue = 9 | pages = 1509–18 | date = September 2004 | pmid = 15347718 }}</ref> – 20 mm<ref>{{cite web|url=http://bestpractice.bmj.com/best-practice/monograph/838/diagnosis/step-by-step.html|title=Assessment of lymphadenopathy|website=[[BMJ Best Practice]]|accessdate=2017-03-04}} Last updated: Last updated: Feb 16, 2017</ref>
|-
| Pelvis || 10 mm for ovoid lymph nodes, 8 mm for rounded<ref name=Torabi2004/>
|-
!colspan=2|Neck
|-
| Generally (non-retropharyngeal) || 10 mm<ref name=Torabi2004/><ref name=Saba2016>[https://books.google.com/books?id=q7v1CwAAQBAJ&pg=PA432 Page 432] in: {{cite book|title=Image Principles, Neck, and the Brain|author=Luca Saba|publisher=CRC Press|year=2016|isbn=9781482216202}}</ref>
|-
| Jugulodigastric lymph nodes || 11mm<ref name=Torabi2004/> or 15 mm<ref name=Saba2016/>
|-
| Retropharyngeal || 8 mm<ref name=Saba2016/>
*Lateral retropharyngeal: 5 mm<ref name=Torabi2004/>
|-
!colspan=2|Mediastinum
|-
| [[Mediastinum]], generally || 10 mm<ref name=Torabi2004/>
|-
| Superior mediastinum and high paratracheal || 7mm<ref name="SharmaFidias2004"/>
|-
| Low paratracheal and subcarinal || 11 mm<ref name="SharmaFidias2004">{{cite journal|last1=Sharma|first1=Amita|last2=Fidias|first2=Panos|last3=Hayman|first3=L. Anne|last4=Loomis|first4=Susanne L.|last5=Taber|first5=Katherine H.|last6=Aquino|first6=Suzanne L.|title=Patterns of Lymphadenopathy in Thoracic Malignancies|journal=RadioGraphics|volume=24|issue=2|year=2004|pages=419–434|issn=0271-5333|doi=10.1148/rg.242035075|pmid=15026591|url=https://semanticscholar.org/paper/145256a2605c552c77534f2a509227902440bf7b}}</ref>
|-
!colspan=2| Upper abdominal
|-
| Retrocrural space || 6 mm<ref name="DorfmanAlpern1991">{{cite journal|last1=Dorfman|first1=R E|last2=Alpern|first2=M B|last3=Gross|first3=B H|last4=Sandler|first4=M A|title=Upper abdominal lymph nodes: criteria for normal size determined with CT.|journal=Radiology|volume=180|issue=2|year=1991|pages=319–322|issn=0033-8419|doi=10.1148/radiology.180.2.2068292|pmid=2068292}}</ref>
|-
| Paracardiac || 8 mm<ref name="DorfmanAlpern1991"/>
|-
| Gastrohepatic ligament || 8 mm<ref name="DorfmanAlpern1991"/>
|-
| Upper paraaortic region || 9 mm<ref name="DorfmanAlpern1991"/>
|-
| Portacaval space || 10 mm<ref name="DorfmanAlpern1991"/>
|-
| Porta hepatis || 7 mm<ref name="DorfmanAlpern1991"/>
|-
| Lower paraaortic region || 11 mm<ref name="DorfmanAlpern1991"/>
|}

Lymphadenopathy of the '''axillary''' lymph nodes can be defined as solid nodes measuring more than 15 mm without fatty hilum.<ref name=dahnert2011>[https://books.google.com/books?id=uYREa2bKNW8C&pg=PA559 Page 559] in: {{cite book|title=Radiology Review Manual|author=Wolfgang Dähnert|publisher=Lippincott Williams & Wilkins|year=2011|isbn=9781609139438}}</ref> Axillary lymph nodes may be normal up to 30 mm if consisting largely of fat.<ref name=dahnert2011/>

In '''children''', a short axis of 8 mm can be used.<ref>[https://books.google.com/books?id=nmpI1bLGCV4C&pg=PA942 Page 942] in: {{cite book|title=High Yield Imaging Gastrointestinal HIGH YIELD in Radiology|author=Richard M. Gore, Marc S. Levine|publisher=Elsevier Health Sciences|year=2010|isbn=9781455711444}}</ref> However, inguinal lymph nodes of up to 15 mm and cervical lymph nodes of up to 20 mm are generally normal in children up to age 8–12.<ref>{{cite web|website=[[Patient UK]]|url=http://patient.info/doctor/generalised-lymphadenopathy|title=Generalised Lymphadenopathy|author=Laurence Knott|accessdate=2017-03-04}} Last checked: 24 March 2014</ref>

Lymphadenopathy of more than 1.5 cm - 2 cm increases the risk of cancer or granulomatous disease as the cause rather than only inflammation or infection.<ref name="pmid12484692">{{cite journal | vauthors = Bazemore AW, Smucker DR | title = Lymphadenopathy and malignancy | journal = American Family Physician | volume = 66 | issue = 11 | pages = 2103–10 | date = December 2002 | pmid = 12484692 }}</ref>

Talk:Lymph nodes - Revision history

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