Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . Streaky left basilar opacities may be due to atelectasis or scarring . The lungs are otherwise clear , and there is no pulmonary vascular congestion or effusion . Cardiac silhouette is mildly enlarged . Mid thoracic compression deformity is seen , age indeterminate without prior exam . Osseous structures are otherwise unremarkable . Surgical clips in the right upper quadrant suggest prior cholecystectomy . Slight contour irregularity at the left lateral aspect of the trachea at the thoracic inlet possibility from underlying thyroid enlargement .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Age-indeterminate mid thoracic compression deformity . 3 . Slight contour deformity of the left lateral aspect of the trachea at the thoracic inlet , raising possibility of underlying thyroid enlargement . Ultrasound can be performed if desired and not already done .