Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is blunting of the left lateral costophrenic angle thought to represent a small effusion . The lungs are clear without consolidation . Cardiac silhouette is within normal limits . The thoracic aorta is aneurysmal and tortuous . The arch measures in the range of 7 .5 cm . No acute osseous abnormalities . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
Significantly aneurysmal and tortuous thoracic aorta . Small left pleural effusion .