Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate an increasing retrocardiac opacity which is concerning for pneumonia . There has been progressive increase in an AP window opacity between ___ and ___ , potentially representing pulmonary hypertension . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Increasing retrocardiac opacity concerning for pneumonia . 2 . A change in cardiomediastinal contour between ___ and ___ , with an increase in AP window opacity , potentially represents pulmonary hypertension . Recommend an ECHO for further evaluation , and possibly subsequent CT chest if question persists . These findings were communicated via telephone by ___ , MD , with ___ , RN , at the office of Dr . ___ at ___ on ___ .