Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate unchanged left basilar opacity , likely atelectasis , with left pleural effusion and stable cardiac size . The mediastinum again appears wide , as before , and the left mediastinal fullness may indicate fluid accumulation . No new focal opacities identified . There is no pneumothorax . At the level of the left hilus , the contour of the descending aorta is not well seen .
    OUTPUT:
    
No pneumothorax . No significant change since prior study . However , left mediastinal fullness and relative obliteration of the contour of the aorta at the level of the left hilus warrants followup CT scan to establish baseline evaluation of the mediastinum . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at 3 : 20 p .m . , within five minutes of discovery .