Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal and without change . Assessment of the lungs is remarkable for an apparent pulmonary nodule in the left retrocardiac region , measuring approximately 1 .8 cm in diameter and not definitively confirmed on the lateral view . Localized scarring at the extreme lung bases appears unchanged with no pleural effusion or acute skeletal finding . Surgical clips are present in the right axilla .
    OUTPUT:
    
Possible 1 .8 cm diameter left lower lobe lung nodule . Considering prior history of colon cancer , chest CT is recommended for confirmation and further characterization as entered into the radiology communications dashboard on ___ .