Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding PA and lateral chest examination of ___ . Heart size and mediastinal structures remain unchanged . No evidence of pulmonary vascular congestion . Seen on previous examination , residual air - fluid level in the upper pleural space has disappeared and apparently has been replaced by local minor pleural thickening in the apical area . It is noted that the previously identified pulmonary abnormality presenting left upper lobe carcinoma has not progressed significantly . On the lateral view , we can identify that the previously existing extensive pleural density in the dorsal pleural compartment has regressed and almost disappeared . There is no evidence of any new left - sided pulmonary parenchymal abnormality . The right - sided hemithorax remains unremarkable as before .
    OUTPUT:
    
Improvement of previously identified left - sided pleural abnormalities . Stable appearance of left - sided pulmonary parenchymal densities identified , previously as representing lung cancer . Right hemithorax remains unremarkable as before .