View source for Crazy paving (medicine)

{{Short description|Medical sign on CT of the chest}}
{{use dmy dates|date=May 2020}}
[[File:Crazy paving pattern on chest CT scan.jpg|thumb|Chest CT scan showing crazy paving pattern]]
'''Crazy paving''' refers to a pattern seen on [[computed tomography]] of the chest, involving lobular [[Alveolar septum|septal]] thickening with variable [[Pulmonary alveolus|alveolar]] filling. The finding is seen in [[pulmonary alveolar proteinosis]],<ref>{{Cite journal|last1=Ishii|first1=Haruyuki|last2=Trapnell|first2=Bruce C.|last3=Tazawa|first3=Ryushi|last4=Inoue|first4=Yoshikazu|last5=Akira|first5=Masanori|last6=Kogure|first6=Yoshihito|last7=Tomii|first7=Keisuke|last8=Takada|first8=Toshinori|last9=Hojo|first9=Masayuki|last10=Ichiwata|first10=Toshio|last11=Goto|first11=Hajime|date=November 2009|title=Comparative Study of High-Resolution CT Findings Between Autoimmune and Secondary Pulmonary Alveolar Proteinosis|journal=Chest|language=en|volume=136|issue=5|pages=1348–1355|doi=10.1378/chest.09-0097|pmid=19892674}}</ref> and other diseases.<ref>{{Cite journal|last1=Holbert|first1=J. Michael|last2=Costello|first2=Philip|last3=Li|first3=Wei|last4=Hoffman|first4=Robert M.|last5=Rogers|first5=Robert M.|date=May 2001|title=CT Features of Pulmonary Alveolar Proteinosis|journal=American Journal of Roentgenology|language=en|volume=176|issue=5|pages=1287–1294|doi=10.2214/ajr.176.5.1761287|pmid=11312196|doi-access=|issn=0361-803X}}</ref> Its name comes from its resemblance to irregular [[paving stone]]s, called [[crazy paving]]s.<ref>{{Cite journal|last1=De Wever|first1=Walter|last2=Meersschaert|first2=Joke|last3=Coolen|first3=Johan|last4=Verbeken|first4=Eric|last5=Verschakelen|first5=Johny A|date=April 2011|title=The crazy-paving pattern: a radiological-pathological correlation|journal=Insights into Imaging|language=en|volume=2|issue=2|pages=117–132|doi=10.1007/s13244-010-0060-5|issn=1869-4101|pmc=3259383|pmid=22347941}}</ref>
==Causes==
There are variety of causes for crazy paving patterns: infection, cancer, blood related disorders, diseases caused by inhalation of particles, and [[idiopathic disease]]. Specific lung disorders that can cause such patterns are: [[pneumocystis pneumonia]], [[Adenocarcinoma in situ of the lung|mucinous bronchioloalveolar carcinoma]], pulmonary alveolar proteinosis, [[sarcoidosis]], nonspecific interstitial pneumonia, [[organizing pneumonia]], exogenous lipoid pneumonia, adult respiratory distress syndrome, and pulmonary hemorrhage syndromes.<ref name="Rossi 2003">{{Cite journal |last=Rossi |first=Santiago E. |last2=Erasmus |first2=Jeremy J. |last3=Volpacchio |first3=Mariano |last4=Franquet |first4=Tomas |last5=Castiglioni |first5=Teresa |last6=McAdams |first6=H. Page |date=November 2003 |title=“Crazy-Paving” Pattern at Thin-Section CT of the Lungs: Radiologic-Pathologic Overview |url=http://pubs.rsna.org/doi/10.1148/rg.236035101 |journal=RadioGraphics |language=en |volume=23 |issue=6 |pages=1509–1519 |doi=10.1148/rg.236035101 |issn=0271-5333}}</ref>
==References==
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[[Category:Radiologic signs]]
[[Category:Respiratory system imaging]]