Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is stably enlarged . The pulmonary vasculature is unremarkable . Recently seen right - sided pleural effusion is decreased in size . There is a persistent left - sided basilar opacity and pneumothorax , no definite right - sided pneumothorax is identified .
    OUTPUT:
    
Stable left basilar pneumothorax .