Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . A peripheral nodular opacity in the left upper lobe is again seen measuring approximately 2 .6 x 2 .6 cm , better assessed on recent CT . Underlying fibrotic lung disease is noted . A similar pattern of lower lung opacities is seen compared with recent prior exam likely reflecting emphysema / fibrosis . No large effusion or pneumothorax . Cardiomediastinal silhouette stable . Bony structures intact .
    OUTPUT:
    
2 .6 cm mass in the left upper lobe is concerning for a neoplasm . Extensive underlying emphysema / fibrosis .