Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild - to - moderately enlarged . The chest is hyperinflated . There is mild unfolding and calcification along the thoracic aorta . There is no definite pleural effusion or pneumothorax . Fissures are thickened and the interstitium is moderately prominent . Projecting over the medial left upper lobe is a focal opacity which has vague borders and measures about 3 cm . This is compatible but not diagnostic of a focal consolidation . A pulmonary mass with associated atelectasis would be an additional consideration . The bones are probably demineralized .
    OUTPUT:
    
1 . Focal opacity in the left upper lobe , which could be seen with consolidative pneumonia , but a mass is not excluded . If clinical circumstances suggest pneumonia , then short - term followup radiographs could be considered within four weeks for close surveillance . Otherwise , chest CT could be considered , although the latter can not always distinguish malignancy from infection . 2 . Findings consistent with mild - to - moderate interstitial pulmonary edema . Atypical infection or severe airway inflammation are other possibilities , but probably less likely . 3 . Cardiomegaly .