Fig. 1.

Chest CT scans, axial images with parenchymal window at day 17 (A), day 27 (B) and day 37 (C).

(A) Bilateral, symmetrical pulmonary opacification with anteroposterior gradient, including dense consolidation in the dependant areas and ground glass opacities in the non-dependant lung consistent with early ARDS.

(B) Worsening ground glass opacities associated with a few reticulations in the non-dependant regions. No evidence of underlying fixed fibrosis (normal appearance of the bronchial tree).

(C) Partial resolution of the ground glass opacities. Coarse reticular pattern in the anterior, aerated lung with traction bronchiectasis suggesting underlying fibrosis. Multiple small and coalescent pulmonary cysts are probably related to prolonged ventilation.