Clinical and radiological manifestations of lipoid pneumonia according to etiology: Squalene, omega-3-acid ethyl esters, and idiopathic.

In comparison with the exogenous group, the idiopathic group demonstrated BAL lymphocytosis, higher rates of recurrence and BAF, and a higher rate of crazy-paving pattern. Compared with the O-3-AEE group, the squlaene group showed a higher percentage of BAL neutrophils and predominant RML involvement.