Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate chronic elevation of the right hemidiaphragm , although , to a lesser degree than prior . There is linear atelectasis noted at the right lung base . There are new widespread reticulonodular opacities throughout both lungs . There is no pleural effusion or pneumothorax . The cardiac silhouette is mildly enlarged . A large mass is again seen within the AP window and appears grossly unchanged . The previously seen pulmonary nodules are too small to be appreciated on this study . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
1 . New , widespread reticulonodular opacities since ___ of uncertain chronicity . Differential diagnosis includes lymphangitic spread of neoplasm versus more acute processes such as edema , drug toxicity and atypical pneumonia . Consider HRCT for more complete characterization if warranted clinically . 2 . Persistent aorticopulmonary window mass . 3 . Right basilar atelectasis adjacent to a chronically elevated right hemidiaphragm .