Fig. 13.

A 15-year-old girl in close contact with a relative with COVID-19 presented with 3 days of fever and dyspnoea. a A posteroanterior chest radiograph shows small opacities in the middle fields of the left lung (arrow). b An axial chest CT performed the same day demonstrates multifocal areas of rounded ground glass opacities, with a predominantly peripheral, subpleural location in the posterobasal segment of the left lower lobe. Intralobular reticulations can be seen superimposed on the ground glass opacities, resulting in a crazy paving pattern. c Axial images of the lung bases in the same CT show focal unilateral band of ground glass in the left lower lobe around the pleural reflection overlying the phrenic nerve. d Axial thin maximum intensity sagittal reconstruction in the same CT demonstrates focal vascular engorgement (arrows) in the anteromedial segment of the left lower lobe, compared with the upper lobe. e An axial lung ultrasound image obtained 2 days later as a follow-up diagnostic procedure shows B lines (arrow) within the lower posterior and lateral lung areas of the left lung, corresponding to the opacities seen on radiography, as well as pleural thickening