Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right PICC tip is in the proximal SVC , similar in position to the prior exam . Otherwise , no significant interval change . Right lateral costophrenic angle blunting may reflect pleural thickening or small effusion . . A 9 - mm ovoid opacity projecting over the left fifth posterior rib is not clearly imaged on prior exams and could be superimposed normal structures given the short interval time course of development . Left basilar atelectasis is mild . The heart is normal in size . Mediastinal contours are unchanged . The ascending and descending thoracic aorta is tortuous .
    OUTPUT:
    
1 . Right PICC tip in proximal SVC , similar to the prior exam . 2 . Trace right pleural effusion versus pleural thickening . 3 . Apparent new nodular opacity in left upper lung is potentially due to a structure external to the patient . Repeat radiograph following removal or repositioning of external devices may be helpful in this regard .