Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the lower superior vena cava . The cardiac , mediastinal and hilar contours appear unchanged . There is a moderate left - sided pleural effusion , similar to perhaps increase since the prior abdominal CT . However , much of the apparent left basilar opacification is associated with moderate relative elevation of the left hemidiaphragm and probably atelectasis . There is no evidence of free air .
    OUTPUT:
    
Left basilar opacification suggesting pleural effusion in combination with parenchymal opacification and elevation of the left hemidiaphragm . Parenchymal opacification is compatible with associated atelectasis , although it is difficult to entirely exclude a coinciding infectious process .