Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rounded opacity in the left upper chest represents loculated fluid within left major fissure , is similar . There is a small left pleural effusion , not appreciably changed . Small left apical pneumothorax is stable . Mildly more prominent left basilar opacity , likely atelectasis . There is minimal new right basilar atelectasis .
    OUTPUT:
    
Stable small left apical pneumothorax . Stable loculated fluid in the left major fissure . No significant change in free - flowing left pleural fluid component . Increased left basilar opacity , likely atelectasis .