Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient 's condition required examination in sitting position using AP frontal and left lateral views . Comparison is made with the next preceding portable AP single view chest examination of ___ . Heart size and mediastinal structures grossly unaltered . Same holds for the previously identified bilateral diaphragmatic linear calcifications compatible with the old asbestos exposure . Left - sided pleural thickenings both in apical area as well as lateral wall and left base remain unchanged and the presence of a small caliber pigtail ending catheter on the left base presumably draining the pleural space appears unchanged . No pneumothorax can be identified . No new pulmonary parenchymal abnormalities .
    OUTPUT:
    
Grossly stable changes with evidence of left - sided pleural effusion .