Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . As on prior , there are indistinct pulmonary vascular markings seen bilaterally . A persistent vague focal opacity in the left upper lung persists and is of uncertain etiology . There is no confluent consolidation . Trace bilateral pleural effusions are seen with blunting of the posterior costophrenic angles . Cardiomediastinal silhouette is stable , noting mild cardiomegaly . Atherosclerotic calcification is again seen at the aortic arch . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
1 . Findings suggestive of pulmonary vascular congestion . No evidence of frank consolidation . 2 . Persistent left upper lobe focal opacity , quite vague but a lung nodule is a differential consideration . Chest CT is recommended to evaluate further when clinically appropriate .