Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest demonstrates increased pleural effusion with atelectasis and / or consolidation in the left lung base . A circumscribed thick - walled cavitary lesion measuring 4 .7 cm in the left mid lung is similar as compared to prior exams and well correlated to a large pulmonary abscess on preceding CT from one day prior . The left upper lung and right lung appear relatively well aerated . The cardiomediastinal silhouette is within normal limits allowing for low lung volumes and AP technique .
    OUTPUT:
    
1 . Left lung cavitary lesion consistent with pulmonary abscess . 2 . Increased left pleural effusion with compressive atelectasis and / or consolidation .