Crazy Paving on Chest CT

Crazy Paving is a appearance that is basically a linear network or reticular pattern in the crazy-paving sign is believed to result from a thickening of the interlobular septa, while areas of ground-glass opacity result from partial alveolar filling processes. Auntminnie or Classic association is with pulmonary alveolar proteinosis.
However, there are many etiologies of Crazy-paving sign such as:


* Pulmonary alveolar proteinosis

* Pneumocystis carinii pneumonia

* Mucinous bronchoalveolar carcinoma

* Sarcoidosis

* Lipoid pneumonia

* Adult respiratory distress syndrome

* Pulmonary hemorrhage