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,
mucinous bronchioloalveolar carcinoma, pulmonary alveolar proteinosis,
sarcoidosis, nonspecific interstitial pneumonia,
organizing pneumonia, exogenous lipoid pneumonia, adult respiratory distress syndrome, and pulmonary hemorrhage syndromes.[4]
References
^Ishii, Haruyuki; Trapnell, Bruce C.; Tazawa, Ryushi; Inoue, Yoshikazu; Akira, Masanori; Kogure, Yoshihito; Tomii, Keisuke; Takada, Toshinori; Hojo, Masayuki; Ichiwata, Toshio; Goto, Hajime (November 2009). "Comparative Study of High-Resolution CT Findings Between Autoimmune and Secondary Pulmonary Alveolar Proteinosis". Chest. 136 (5): 1348–1355.
doi:
10.1378/chest.09-0097.
PMID19892674.
^Holbert, J. Michael; Costello, Philip; Li, Wei; Hoffman, Robert M.; Rogers, Robert M. (May 2001). "CT Features of Pulmonary Alveolar Proteinosis". American Journal of Roentgenology. 176 (5): 1287–1294.
doi:
10.2214/ajr.176.5.1761287.
ISSN0361-803X.
PMID11312196.