Editing Bronchiectasis (section)

=== Airway obstruction ===
An airway obstruction can be caused by either an [[intraluminal]] mass such as a [[tumor]] or a [[Foreign body aspiration|foreign body]].<ref name="Kwon 302–307">{{Cite journal|last1=Kwon|first1=K. Y.|last2=Myers|first2=J. L.|last3=Swensen|first3=S. J.|last4=Colby|first4=T. V.|date=March 1995|title=Middle lobe syndrome: a clinicopathological study of 21 patients|journal=Human Pathology|volume=26|issue=3|pages=302–7|doi=10.1016/0046-8177(95)90062-4 |pmid=7890282|doi-access=free}}</ref> The presence of an airway obstruction leads to a cycle of inflammation.<ref name=Mc2013/> It is important to identify the presence of an obstruction because surgical resection is often curative if obstruction is the cause.<ref>{{Cite journal|last1=Priftis|first1=Kostas N.|last2=Mermiri|first2=Despina|last3=Papadopoulou|first3=Athina|last4=Anthracopoulos|first4=Michael B.|last5=Vaos|first5=George|last6=Nicolaidou|first6=Polyxeni|s2cid=5902678|date=October 2005|title=The role of timely intervention in middle lobe syndrome in children|journal=Chest|volume=128|issue=4|pages=2504–10|doi=10.1378/chest.128.4.2504 |pmid=16236916}}</ref> In adults, foreign body aspiration is often associated with an altered state of consciousness. The foreign body is often unchewed food, or part of a tooth or [[Crown (dentistry)|crown]].<ref>{{Cite journal|last1=Rafanan|first1=A. L.|last2=Mehta|first2=A. C.|date=June 2001|title=Adult airway foreign body removal. What's new?|journal=Clinics in Chest Medicine|volume=22|issue=2|pages=319–330|doi=10.1016/s0272-5231(05)70046-0 |pmid=11444115}}</ref> Bronchiectasis that results from foreign body aspiration generally occurs in the right lung in the lower lobe or posterior segments of the upper lobe.<ref name=":6">{{EMedicine|article|296198|Aspiration Pneumonitis and Pneumonia: Overview of Aspiration Pneumonia, Predisposing Conditions for Aspiration Pneumonia, Pathophysiology of Aspiration Pneumonia}}</ref>