Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is near - complete opacification of the left hemithorax , due to atelectasis / collapse of the left lung . There is leftward deviation of the trachea , as before . The right demonstrates slight interval worsening of linear basal atelectasis . Chronic right humeral head dislocation is again noted , unchanged compared to the prior study .
    OUTPUT:
    
Atelectasis / collapse of the left lung . Right basilar atelectasis is sligtly worse . Chest phsyiotherapy and bronchoscopy is recommended . Chronic right humeral head dislocation .