Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . Small bilateral pleural effusions are apparent on the lateral view . There is no pneumothorax . The lungs are well - expanded . There is a new partly ill - defined density in the right upper lobe , concerning for pneumonia . This area appears confluent with the previously noted right upper lobe partly solid lesion , best assessed on the prior chest CT . A more subtle opacity along the right upper mediastinum is again noted , consistent with the patient 's known malignancy . The upper abdomen is unremarkable .
    OUTPUT:
    
1 . New right upper lobe density concerning for pneumonia . Enlarging mass is in the differential diagnosis . 2 . Known right upper lobe masses consistent with malignancy are better assessed on the recent chest CT .