Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is left basilar opacity which is thought to represent at least some component of pleural effusion and atelectasis , noting that underlying infection is also possible . Fluid also seen tracking along the left major fissure and lateral to the lung more superiorly . The right lung remains clear . Cardiac silhouette is difficult to assess given silhouetting on the left . Atherosclerotic calcifications seen in the arch and descending thoracic aorta . Tubing overlying the anterior aspect of the chest is likely a ventriculoperitoneal shunt . Lower thoracic / upper lumbar dextroscoliosis is noted .
    OUTPUT:
    
Left base opacity thought to represent at least some component of pleural effusion also tracking laterally and within the major fissure . There is likely underlying atelectasis with infection not excluded .