There is interval worsening of opacification in the left lung, with near-complete opacification of the left hemithorax. Despite the rotation, there is no mediastinal shift, and the trachea remains midline. The pattern may suggest an increasing pleural effusion, lung collapse, or consolidation. A chest CT is recommended for further evaluation if clinically indicated.
Simple pleural effusion (Uncertain) Lung collapse (Uncertain) Pneumonia (Uncertain)