Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Small left apical pneumothorax persists . No evidence of tension . Overall stable small left pleural effusion , which may be loculated . Severe left atelectasis with presumed pleural restriction is overall unchanged with associated leftward shift of the mediastinum . Appearance of the right lung is unchanged and clear . Cardiomediastinal silhouette is also unchanged .
    OUTPUT:
    
1 . Persistent small left apical pneumothorax without evidence of tension . 2 . Stable small left pleural effusion which may be loculated . 3 . Severe left atelectasis due to presumed pleural restriction .