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Crazy paving

Changed by Jay Gajera, 16 Feb 2023
Back to revision history
Disclosures - updated 7 Feb 2023: Nothing to disclose

Updates to Article Attributes

Body was changed:

Crazy paving refers to the appearance of ground-glass opacities with superimposed interlobular septal thickening and intralobular septal thickening, seen on chest HRCT or standard CT chest. It is a non-specific finding that can be seen in a number of conditions. 

Pathology

Aetiology

Common causes:

Less common causes:

  • -<li><a href="/articles/acute-respiratory-distress-syndrome-1">acute respiratory distress syndrome (ARDS)</a></li>
  • -<li><a href="/articles/bacterial-pneumonia">bacterial pneumonia</a></li>
  • -<li>
  • -<a href="/articles/acute-interstitial-pneumonia">acute interstitial pneumonia</a>: ARDS of unknown aetiology</li>
  • -<li>
  • -<a href="/articles/pulmonary-alveolar-proteinosis">pulmonary alveolar proteinosis (PAP)</a>: the great majority of patients with PAP demonstrate crazy paving</li>
  • +<li><p><a href="/articles/pulmonary-oedema" title="Pulmonary oedema">pulmonary oedema</a> (most common)</p></li>
  • +<li><p><a href="/articles/acute-respiratory-distress-syndrome-1">acute respiratory distress syndrome (ARDS)</a></p></li>
  • +<li><p><a href="/articles/bacterial-pneumonia">bacterial pneumonia</a></p></li>
  • +<li><p><a href="/articles/acute-interstitial-pneumonia">acute interstitial pneumonia</a>: ARDS of unknown aetiology</p></li>
  • +<li><p><a href="/articles/pulmonary-alveolar-proteinosis">pulmonary alveolar proteinosis (PAP)</a>: the great majority of patients with PAP demonstrate crazy paving</p></li>
  • -<li><a href="/articles/drug-induced-pneumonitis">drug-induced pneumonitis</a></li>
  • -<li><a href="/articles/radiation-pneumonitis">radiation pneumonitis</a></li>
  • -<li>
  • -<a href="/articles/pulmonary-haemorrhage">pulmonary haemorrhage / diffuse pulmonary haemorrhage</a><ul><li><a href="/articles/goodpasture-syndrome">Goodpasture syndrome</a></li></ul>
  • -</li>
  • -<li><a href="/articles/chronic-eosinophilic-pneumonia">chronic eosinophilic pneumonia</a></li>
  • +<li><p><a href="/articles/drug-induced-pneumonitis">drug-induced pneumonitis</a></p></li>
  • +<li><p><a href="/articles/radiation-pneumonitis">radiation pneumonitis</a></p></li>
  • -<a href="/articles/usual-interstitial-pneumonia">usual interstitial pneumonia (UIP)</a> with superimposed <a href="/articles/diffuse-alveolar-damage">diffuse alveolar damage</a>
  • +<p><a href="/articles/pulmonary-haemorrhage">pulmonary haemorrhage / diffuse pulmonary haemorrhage</a></p>
  • +<ul><li><p><a href="/articles/goodpasture-syndrome">Goodpasture syndrome</a></p></li></ul>
  • -<li><a href="/articles/pulmonary-oedema">pulmonary oedema</a></li>
  • +<li><p><a href="/articles/chronic-eosinophilic-pneumonia">chronic eosinophilic pneumonia</a></p></li>
  • +<li><p><a href="/articles/usual-interstitial-pneumonia">usual interstitial pneumonia (UIP)</a> with superimposed <a href="/articles/diffuse-alveolar-damage">diffuse alveolar damage</a></p></li>
  • -<a href="/articles/pulmonary-infection">pulmonary infections</a><ul>
  • -<li><a href="/articles/mycoplasma-pneumonia">mycoplasma pneumonia</a></li>
  • -<li><a href="/articles/obstructive-pneumonia">obstructive pneumonia</a></li>
  • -<li><a href="/articles/tuberculosis">tuberculosis</a></li>
  • -<li><a href="/articles/pulmonary-pneumocystis-jiroveci-infection"><em>Pneumocystis jirovecii</em> pneumonia (PCP)</a></li>
  • -<li><a href="/articles/covid-19-4">COVID-19</a></li>
  • +<p><a href="/articles/pulmonary-infection">pulmonary infections</a></p>
  • +<ul>
  • +<li><p><a href="/articles/mycoplasma-pneumonia">mycoplasma pneumonia</a></p></li>
  • +<li><p><a href="/articles/obstructive-pneumonia">obstructive pneumonia</a></p></li>
  • +<li><p><a href="/articles/tuberculosis">tuberculosis</a></p></li>
  • +<li><p><a href="/articles/pulmonary-pneumocystis-jiroveci-infection"><em>Pneumocystis jirovecii</em> pneumonia (PCP)</a></p></li>
  • +<li><p><a href="/articles/covid-19-4">COVID-19</a></p></li>
  • -<li>
  • -<a href="/articles/cryptogenic-organising-pneumonia-1">cryptogenic organising pneumonia</a> (COP, formerly BOOP)</li>
  • -<li>
  • -<a href="/articles/invasive-mucinous-adenocarcinoma-of-the-lung-1">invasive mucinous adenocarcinoma of the lung</a> (formerly <a href="/articles/mucinous-bronchioloalveolar-carcinoma">mucinous bronchoalveolar carcinoma</a>)</li>
  • -<li>
  • -<a href="/articles/pulmonary-sarcoidosis">sarcoidosis</a>, especially <a href="/articles/alveolar-sarcoidosis">alveolar sarcoidosis</a>
  • -</li>
  • -<li><a href="/articles/lipoid-pneumonia">lipoid pneumonia</a></li>
  • -<li><a href="/articles/pulmonary-veno-occlusive-disease">pulmonary veno-occlusive disease</a></li>
  • +<li><p><a href="/articles/cryptogenic-organising-pneumonia-1">cryptogenic organising pneumonia</a> (COP, formerly BOOP)</p></li>
  • +<li><p><a href="/articles/invasive-mucinous-adenocarcinoma-of-the-lung-1">invasive mucinous adenocarcinoma of the lung</a> (formerly <a href="/articles/mucinous-bronchioloalveolar-carcinoma">mucinous bronchoalveolar carcinoma</a>)</p></li>
  • +<li><p><a href="/articles/pulmonary-sarcoidosis">sarcoidosis</a>, especially <a href="/articles/alveolar-sarcoidosis">alveolar sarcoidosis</a></p></li>
  • +<li><p><a href="/articles/lipoid-pneumonia">lipoid pneumonia</a></p></li>
  • +<li><p><a href="/articles/pulmonary-veno-occlusive-disease">pulmonary veno-occlusive disease</a></p></li>

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