Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Similar to prior study , there is extensive scarring of the left greater than right upper lobes with upward retraction of hila the reticular lines radiating to the apex , particularly on the left . The patient is history of sarcoidosis as well as left upper lobectomy . New since the prior study is left mid to lower lung peripheral opacity . No pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Stable chronic findings sarcoidosis . Opacity at the lateral left mid to lower hemi thorax is new since the prior study . Differential diagnosis includes infection , pulmonary infarct not excluded , underlying malignancy not excluded . Chest CT pending .