Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a possible small left pleural effusion not significantly changed from the prior radiograph and decreased in size since the prior CT . Alternatively , it may represent mild pleural thickening . There is no right pleural effusion . There is no consolidation , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette is normal and unchanged . A right PICC terminates in the low SVC .
    OUTPUT:
    
Stable mild blunting of the left costophrenic angle which could be due to a small left pleural effusion or mild pleural thickening .