Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The mediastinal and hilar contours appear unchanged . There is a retrocardiac opacity , seems to correlate with a small left - sided pleural effusion and associated parenchymal opacity that can probably be attributed to atelectasis . Pneumonia is also a differential consideration , however . There is probably a trace pleural effusion on the right . A nodule in the lingula on the prior CT torso is not well demonstrated on this examination . Sclerotic bony metastases are widespread .
    OUTPUT:
    
1 . Suspected left - sided pleural effusion with parenchymal opacity , for which differential considerations include associated compressive atelectasis or potentially pneumonia in the appropriate setting . 2 . Widespread osseous metastatic disease . 3 . Non-visualization of nodule in the lingula , probably metastatic , from the prior CT ; whether this represents a decrease due to treatment or a limitation of radiographic technique is uncertain .