Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tracheostomy tube appears in relatively horizontal orientation , unchanged from prior examination . However , complete assessment is difficult in this single view . A right PICC line terminates in the region of the right subclavian vein . Feeding tube projects below the contours of the diaphragm , the tip is not included in this examination . There is diffuse mediastinal widening , consistent with known thyroid mass , unchanged from prior examinations . Cardiac silhouette is stable . Widespread pulmonary metastases are again demonstrated . Right lower lung opacity is slightly increased , likely related to a combination of atelectasis and pleural fluid . The left lung is clear .
    OUTPUT:
    
1 . Slightly increased right lower lung opacity , likely related to a combination of atelectasis and pleural fluid . 2 . Unchanged mediastinal contour , in keeping with history of large thyroid mass .