Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in upright position . Comparison is made with the frontal view of the next preceding PA and lateral chest examination dated ___ . The previously existing superior mediastinal mass resulting in marked right - sided deviation and compression of the trachea has been reduced significantly . Minor mediastinal deviation towards the right persists but the lumen of the trachea has improved . Postoperative elevation of diaphragms and thereto related crowded appearance of pulmonary vasculature is noted , but no new parenchymal infiltrates are seen and there is no evidence of pneumothorax in the apical area .
    OUTPUT:
    
Unremarkable postoperative findings status post hemithyroidectomy .