Fig. 2

Chest CT images of a 2-year-old female patient show multiple patchy/nodular ground-glass opacity and consolidation, with blurry margins; the patchy/nodular consolidation is mostly located in the mid and inner zones of the both lower lung lobe (A-D, red boxes and triangles), with high density inside the lesions and relatively low density in the periphery, presenting a “halo sign” appearance; the GGO was located in the outer zone of the left upper lobe (B, red arrow)