Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Midline sternotomy wires and prosthetic mitral valve again noted . Postsurgical changes involving the right lung again noted with extensive scarring appearing grossly stable from prior . However , on the left , there is subtle increase in overall bronchovascular opacity which could represent an atypical pneumonia in the correct clinical setting . A tiny left effusion is likely new in the interval . No pneumothorax . Overall cardiomediastinal silhouette is stable .
    OUTPUT:
    
Stable postop changes in the right chest . Subtle increase in left bronchovascular markings which could in the correct clinical setting reflecting an atypical pneumonia .