Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unchanged mediastinal and hilar contours . Stable cardiac enlargement noted . There is increased distribution and density of the previously noted left upper lobe ground glass opacification . New retrocardiac opacification may represent atelectasis though pneumonia can not be excluded in the correct clinical setting . In addition , there is a new small left pleural effusion . Multiple densely calcified pleural plaques are again noted and may contribute to the appearance of lung parenchymal abnormalities .
    OUTPUT:
    
Ill - defined opacification of the left upper lobe with new retrocardiac opacification and small left pleural effusion . Findings may be attributable to a combination of pleural plaques and left lower lobe pneumonia . However , given the increased risk of malignancy due to asbestosis exposure and evolution of left upper lobe findings , recommend further evaluation , possibly with thoracocentesis . ___ placed these findings on the critical communications dashboard at 14 :05 on ___ at time of discovery .