Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port -a - Cath terminates in the right atrium . A widespread interstitial abnormality with both reticular and nodular features is overall probably similar in severity , allowing for differences in technique , and could be explained based on prior CT findings by carcinomatosis and metastatic nodules . There is patchy increased nodularity along the right lower lung seen laterally on the frontal view , the only apparent change . There is no pleural effusion or pneumothorax . The heart has increased somewhat in size . Degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Fairly stable appearance of the chest with widespread diffuse abnormality previously characterized as likely stemming from carcinomatosis and metastatic nodules . The only change on this examination is patchy increased nodular opacification in the right lower lung . Superimposed infection is a potential explanation for this appearance versus atelectasis or advancing malignancy . The heart size is also increased somewhat , so potentially a pericardial effusion could be considered .