Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with the prior exam , there is a new large opacity involving the left middle and lower lung zones , most consistent with pneumonia . A component of pleural fluid is difficult to exclude . There is mild streaky opacification at the right base with obscuration of the right hemidiaphragm . This could be due to atelectasis , or a second focus of pneumonia . The mediastinal contours are difficult to evaluate given the adjacent opacity , though they appear increased in diameter since the prior exam . This is may be due to technique and obscuration from the left hemithorax opacity . The heart size is difficult to determine because of the adjacent opacity .
    OUTPUT:
    
1 . New large left middle and lower lung zone opacity , most consistent with pneumonia . A component of pleural fluid is difficult to completely exclude . Recommend follow - up to resolution to exclude an underlyingmass . 2 . Smaller opacity at the right base may represent atelectasis or second focus of pneumonia . 3 . Apparent widening of the mediastinum may be related to the AP technique and patient rotation . Recommend a repeat PA and lateral radiograph when the patient is more clinically stable , if high clinical concern for acute mediastinal / aortic process , CT is more sensitive . Results were discussed with Dr . ___ at 10 : 15 a .m . on ___ via telephone by Dr . ___ at the time the findings were discovered .