Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: New nodular opacity in the left upper lobe projecting over the fourth fifth rib interspace measuring 11 mm . There is also prominence of the right paratracheal stripe . The cardiomediastinal silhouette is otherwise unchanged with unfolding of the descending thoracic aorta . Right hemidiaphragm is similar in appearance . no pleural effusions or pneumothorax .
    OUTPUT:
    
New nodule in the left upper lung concerning for malignancy .