Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal lateral chest radiographs demonstrate multiple intact sternal wires . A fiducial marker in a known right lower lobe nodule is again seen , not well evaluated on chest radiograph . Cardiac size is normal and the lungs hyperinflated . The descending aorta appears slightly larger in caliber compared to ___ . A retrocardiac opacity with obscuration of the lateral left hemidiaphragm may be secondary to overlapping hilar structures , given slight patient rotation . However , pneumonia is also a consideration . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Subtle retrocardiac opacity on lateral radiograph , potentially due to overlap of normal structures due to oblique positioning . If there remains clinical suspicion for pneumonia , repeat radiograph with improved positioning would be helpful . 2 . Right lower lobe neoplastic nodule with fiducial marker in place .