Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right Port - A - Cath ends in the low SVC . Lung volumes are slightly low . There is minimal bibasilar atelectasis . Mild cardiomegaly is not significantly changed . The descending thoracic aorta is slightly tortuous , as before . A small left pleural effusion is not excluded . There is no right pleural effusion . No pneumothorax is seen . A linear lucency along the left heart border could be due to minimal pneumomediastinum or a medial left pneumothorax , not unexpected status post mediastinoscopy . S - shaped scoliosis of the thoracolumbar spine is re-demonstrated .
    OUTPUT:
    
1 . Possible minimal pneumomediastinum versus medial left pneumothorax . Follow - up to resolution is recommended . 2 . Unchanged mild cardiomegaly . 3 . Possible tiny small left pleural effusion . Impression point # 1 was discussed with Dr . ___ by Dr . ___ at 11 :56 p .m . via telephone on the day of the study .