Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a severe levoconcave scoliosis of the thoracic spine . The compensatory dextroconcave scoliosis of the lumbar spine is not included on this radiograph as in priors . The lungs , however , remain clear without consolidation or edema . Evidence of prior median sternotomy and CABG noted . The cardiac silhouette size is stable . There is suggestion of blunting posteriorly of the left costophrenic angle which has been noted on prior exams may be due to chronic effusion or scarring . No right effusion is noted . There is no pneumothorax . No displaced fractures are evident .
    OUTPUT:
    
Severe scoliosis . No definite acute pulmonary process noted . There may be a small left pleural effusion .