Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are areas of linear atelectasis at the left lung base . No focal consolidation is identified . The cardiomediastinal silhouette and hilar contours are stable . There is no pleural effusion or pneumothorax . Degenerative changes are noted at the bilateral glenohumeral joints .
    OUTPUT:
    
Atelectasis at the left lung base . No focal consolidation .