Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Known 2 .1 cm pulmonary nodule in the left lower lung , unchanged compared to prior studies . Otherwise , lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . The cardiac , hilar and mediastinal silhouettes are unremarkable . A dual lead transvenous pacemaker with leads terminating in the right atrium and right ventricle noted .
    OUTPUT:
    
Dual lead transvenous pacemaker with leads appropriately positioned . Stable left lower lung pulmonary nodule previously characterized as a hamartoma .