Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in semi-upright position . Comparison is made with the next preceding similar study obtained 12 hours earlier during the same day . During the interval , the left - sided chest tube has been removed and no pneumothorax has developed in the apical area . In comparison with the previous study , the earlier identified patchy confluenting density in the left upper lobe lateral area persists . Also , a left - sided basal density remains obliterating partially the diaphragmatic contour and suspicious for atelectasis and / or pleural effusion . Right - sided basal densities have cleared . Previously described orthopedic overlying lower half of thoracic and upper of lumbar spine , unchanged .
    OUTPUT:
    
No pneumothorax developed following left - sided chest tube removal .