Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Port - A - Cath resides over the right chest wall with catheter tip extending to the region of the upper SVC . Extensive opacity in the right mid and lower lung is consistent with known malignancy . Difficult to exclude a superimposed pneumonia . Right pleural effusion has decreased somewhat in the interval , now moderate in size . The left lung appears clear . No large pneumothorax though the patient 's chin obscures the superior mediastinum . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Moderate pleural effusion on the right is decreased from prior CT , extensive opacity in the right lung likely represent represents patient 's known malignancy though superimposed pneumonia is difficult to exclude .