Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is patchy left base retrocardiac opacity worrisome for pneumonia or possibly aspiration . Additionally , there is subtle right upper lobe opacity in similar distribution as the frank consolidation seen on prior radiograph which may be due to underlying scarring or , as on chest CT from ___ , the patient had underlying chronic regional right upper lobe interstitial infiltration with mild bronchiectasis , chronic . No large pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Left lower lobe opacity worrisome for pneumonia . Recommend followup to resolution .