Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Large consolidation involving the right lower lobe and right middle lobe , worrisome for pneumonia . While not in the reported history for this radiograph , upon further investigation , the patient has a history of right perihilar mass . Findings may represent combination of perihilar mass and pneumonia . There may be a small right pleural effusion . The left lung is grossly clear aside from minimal left base atelectasis . No pneumothorax is seen . The cardiac and mediastinal silhouettes are grossly similar , given some obscuration on the right due to opacity .
    OUTPUT:
    
Large area of opacity involving the right middle and lower lobes , worrisome for pneumonia . Patient has known right perihilar mass and findings may represent combination of pneumonia and perihilar mass .